Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Smartphones, laptops and tablets are the modern devices _____ have

changed the way we learn.  
A.What   
B.Whose      
C.What    
D.x

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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 27 to 34.
For many American university students, the weeklong spring break holiday means on endless party on a sunny beach in Florida or Mexico. In Panama City Beach in Florida, a city with permanent population of around 36.000 more than half a million university students arrive during the month of March to play and party making it the number one spring break destination in the United States              
A weeklong drinking binge is not for everyone, however and a growing number of American university students have found a way to make spring break matter. For them. joining or leading a group of volunteers to travel locally or internationally and work to alleviate problems such as poveriy, homelessness, or environmental damage makes spring break a unique learning experience that university students can feel good about.
During one spring break students at James Madison University in Virginia participated in 15 alternative spring break" trips to nearby states, three others to more distant parts of the United States and five international trips. One group of JMU students travelled to Bogalusa, Louisiana to help rebuild homes damaged by Hurricane Katrina. Another group traveled to Mississippi to organize creative activities for children living in homeless shelter. One group of students did go to exhausting physical labor such Florida. but not to lie on the sand. They performed as maintaining hikra rails and destroying invasive plant species that threaten the native Florida ecosystem.              
Students who participate in alternative spring break projects find them very rewarding. While most university students have to get their degrees before they can start helping people. students volunteers are able to help people now. On the other hand, the accommodations are far from glamorous. Students often sleep on he floor of a school or church, or spend the week camping in tents. But students only pay around $250 for meals and transportation. which is much less than some their peers spend to travel to more traditional spring break hotspots               
Alternative spring break trips appear to be growing in popularity at universities across the United States. Students cite a number of reasons for participating. Some appreciate the opportunity to socialize and meet new friends. Others want to exercise their beliefs about peoples obligation to serve humanity and make the world a better place. Whatever their reasons, these students have discovered something that gives them rich rewards along with a break from school work.
(“active Skills for Reading: Book 2” by Neill J. Anderson – Thompson, 2007)
Which of the following gives the main idea of the third paragraph?     
A.One group of JMU students worked on homes damaged by a hurricane.
B.Some students  work to help the environment on alternative spring break trips.
C.Children living in homesless shelters enjoy creative activities.
D.University students do may different types of work on alternative spring break trips.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
            In 1752, Benjamin Franklin made his textbook experiment with a brass key and a silk kite that he flew in a thunderstorm to prove that lightning and electricity are the same thing. In 1920, a kite-flying championship for families and individuals was held in London. These two seemingly unrelated events underscore the fact that kites can be flown for both pleasure and scientific purposes. For example, in the 1800s weather bureaus flew kites to record temperature and humidity at certain altitudes. On one occasion, ten kites were strung together and flown at a height of four miles to lift men and carry cameras aloft.
            The kite’s ability to fly depends on its construction and the way that its line is attached. The familiar diamond - shaped kite flies when its covered face is aligned against the wind flow. The line attached to the nose of the kite pulls it into the wind, thus creating the necessary angle for the lift force. If the kite’s construction and the angle of the air stream are correct, the kite will encounter greater pressure against its face and lower pressure against its back. The difference in the pressure creates a lift that causes the kite to rise until it hangs level from its bridle. Its angle against the wind should be sufficiently large or small to create maximum lift to overcome both drag and gravity. The towing point to which the line is attached is important because it sets the kite’s angle relative to the air flow. Although the kite must be headed up and into the wind with a velocity of 8 to 20 miles per hour, it can maintain its position through a tail, a rudder, a keel, vents, or tassels.
According to the passage, the kite flies when its nose is ______.
A.pointed away from the ground                                          
B.balanced with the tail
C.pointed into the wind flow             
D.aligned parallel to the wind flow