Why does the author refer to Gilbert White's book in line 2?
A.To show how attitudes have changed since 1786.
B.To contradict the idea that animals can count.
C.To indicate that more research is needed in this field.
D.To provide evidence that some birds are aware of quantities.

Read the passage carefully, then choose the correct answers. 
The search for alternative sources of energy has led in various directions. Many communities are burning garbage and other biological waste products to produce electricity- Converting waste products to gases or oil is also an efficient way to dispose of wastes. Experimental work is being done to derive synthetic fuels from coal, oil shale, and coal tars. But to date, that process has proven expensive. Other experiments are underway to harness power with giant windmills. Geothermal power is also being tested. Some experts expect utility companies to revive hydroelectric power derived from streams and rivers. Fifty years ago hydroelectric power provided one third of the electricity used in theUnited States, but to day it supplies only 4 percents. The oceans are another potential source of energy. Scientists are studying ways to convert the energy of ocean currents, tides, and waves to electricity. Experiments are also underway to make use of temperature differences in ocean water to produce energy.
What could Rest replace the phrase 'geothermal power' in the passage?
A.heat from the earth
B.gases in the earth's atmosphere
C.steam that shot up out of the earth
D.water in the ocean, lake, or river

He was too ill to go to work.
A.He wasn't enough well to go to work.
B.He wasn't well enough for going to work.
C.He wasn't well enough to go to work.
D.He wasn't enough well to work.

The word "assassinated" in the second paragraph is closest in meaning to
A.murdered                   
B.decorated                      
C.honored                         
D.sickened

If nobody puts some more coal in, the fire will go out.
A.Unless thhe fire won't go out, someone puts some more coal in
B.Unless omebody puts some more coal, the fire will go out
C.Unless somebody hasn't put some more coal, the fire will go out
D.Unless omebody has put some more coal, the fire will go out

- Mike: "Would you like a beer?"          - Joe: "Not while I’m _______ ."
A.in the act    
B.on duty
C.in order  
D. under control

You won’t ________ with the others in the class unless you try your best.
A.turn up  
B. take up 
C.keep up
D.get up

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
When I went on a holiday with my friends I bought a pair of ______.
A.Italian old lovely shoes 
B.lovely old Italian shoes
C.Italian lovely old shoes        
D.old lovely Italian shoes

Choose the word that has the underlined part pronounced differently from the others.

A.A. great   
B.B. available                
C. C. raise                        
D.D. said

Martha, Julia and Mark are l7, l9 and 20 years old_____
A.separately
B.respectively
C.independently
D.respectfully