Something began to go ____________ with the experiment when the two scientists were forced to retire.
A.wrong  
B. stale  
C.faulty  
D.ill

During the earthquake, a lot of buildings collapsed, which killed thousands of people.
 
A.fell down unexpectedly  
B.went off accidentally
C.erupted violently
D.exploded suddenly

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
George graduated with a good degree. However, he joined the ranks of the unemployed.
A.A. If George graduated with a good degree, he would join the ranks of the unemployed.
B.B. George joined the ranks of the unemployed because he graduated with a good degree.
C.C. Although George graduated with a good degree, he joined the ranks of the unemployed.
D.D. That George graduated with a good degree helped him join the ranks of the unemployed.

Read the passage carefully, then choose the correct answers.
At present, people depend on unlimited energy to power their everyday lives. A wide range of energy-run devices and modern conveniences are taken for granted, and although it may seem that we will never be in danger of living without those conveniences, the fact is that many supplies of energy are dwindling rapidly. Scientists are constantly searching for new sources of power to keep modern society running. Whether future populations will continue to enjoy the benefit of abundant energy will depend on the success of this search.
Coal, oil, and natural gas supply modern civilization with most of its power. However, not only are supplies of these fuels limited, but they are a major source of pollution. If the energy demands of the future are to be met without seriously harming the environment, existing alternative energy sources must be improved or further explored and developed. These include nuclear, water, solar, wind, and geothermal power, as well as energy from new, nonpolluting types of fuels. Each of these alternatives, however, has advantages and disadvantages.
Nuclear power plants efficiently produce large amounts of electricity without polluting the atmosphere; however, they are costly to build and maintain, and they pose the daunting problem of what to do with nuclear wastes. Hydroelectric power is inexpensive and environmentally safe, but impractical for communities located far from moving water. Harnessing energy from tides and waves has similar drawbacks. Solar power holds great promise for the future but methods of collecting and –concentrating sunlight are as yet inefficient, as are methods of harnessing wind power.
Every source of energy has its disadvantages. One way to minimize them is to use less energy. Conservation efforts coupled with renewable energy resources, such as a combination of solar, water, wind, and geothermal energy and alternative fuels, such as alcohol and hydrogen, will ensure supplies of clean, affordable energy for humanity's future.
Which of the following can be inferred from the passage?
A.The search for alternative energy sources is not over.
B.Our present energy sources must be eliminated and replaced with alternatives sources.
C.Alternative sources of energy on this planet are very limited.
D.Demand for energy in the future are likely to decrease.

Read the passage carefully, then choose the correct answers.
At present, people depend on unlimited energy to power their everyday lives. A wide range of energy-run devices and modern conveniences are taken for granted, and although it may seem that we will never be in danger of living without those conveniences, the fact is that many supplies of energy are dwindling rapidly. Scientists are constantly searching for new sources of power to keep modern society running. Whether future populations will continue to enjoy the benefit of abundant energy will depend on the success of this search.
Coal, oil, and natural gas supply modern civilization with most of its power. However, not only are supplies of these fuels limited, but they are a major source of pollution. If the energy demands of the future are to be met without seriously harming the environment, existing alternative energy sources must be improved or further explored and developed. These include nuclear, water, solar, wind, and geothermal power, as well as energy from new, nonpolluting types of fuels. Each of these alternatives, however, has advantages and disadvantages.
Nuclear power plants efficiently produce large amounts of electricity without polluting the atmosphere; however, they are costly to build and maintain, and they pose the daunting problem of what to do with nuclear wastes. Hydroelectric power is inexpensive and environmentally safe, but impractical for communities located far from moving water. Harnessing energy from tides and waves has similar drawbacks. Solar power holds great promise for the future but methods of collecting and –concentrating sunlight are as yet inefficient, as are methods of harnessing wind power.
Every source of energy has its disadvantages. One way to minimize them is to use less energy. Conservation efforts coupled with renewable energy resources, such as a combination of solar, water, wind, and geothermal energy and alternative fuels, such as alcohol and hydrogen, will ensure supplies of clean, affordable energy for humanity's future.
The passage suggests that ______.
A.people use energy without giving great thought to 'where it's coming from
B.the search for energy sources is mainly a problem for the future
C.scientists believe we will never have to go without our modern conveniences
D.modern society requires a minimum amount of energy to keep running

Fill in the blanks with the correct answers.
Have you ever used a magnifying glass to make something melt or burn? If yes, you were using solar power!  "Solar" is the Latin word for "sun" - and it's a powerful (26)________ of energy. In fact, the sunlight that shines on the Earth in just one hour could meet world energy demand (27)__________ an entire year! We can use solar power in two different ways: as a heat source, and as an energy source. People have used the sun as a heat source for thousands of years. Families in ancient Greece built their homes to get the most sunlight (28)________ the cold winter months. In the 1830s, explorer John Herschel used a solar collector to cook food during an adventure in Africa. You can even try this at home! (29)___________, we can use solar collectors for heating water and air in our homes. If you've seen a house with big shiny panels (30)____________, that family is using solar power.
(28)
A.about                      
B.on 
C.during                     
D.through

Choose the word or phrase that needs correcting.
Grover Cleveland was the only American president served two nonconsecutive terms.
A.the only       
B.served                     
C.nonconsecutive                   
D.terms

Choose the word or phrase that best completes the sentence.
______ energy sources include water and wind power.
A.Friendly environmental 
B.Environmentally friendly
C.Friendly environment    
D.Environmental friendly

Choose the word or phrase that best completes the sentence.
There is now increasing concern about the world's energy ______ particularly about those involving fossil fuels.
A.possessions             
B.goods                      
C.materials                 
D.resources

"You didn't lock the door this morning as I found the keys on the table when I got home!" the woman told her son.
 
A.The woman criticized her son for not locking the door that morning, adding that she saw the keys on the table.
B.The woman reproached her son of not locking the door that morning, emphasizing that she saw the keys on the table.
C.The woman scolded her son with unlocking the door that morning as she found the key on the table.
D. The woman blamed her son for not unlocking the door that morning as she found the key on the table.