What does the word “trilogy” in the first paragraph mean?

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 30 to 34 

     Scientists estimate that about 35,000 other objects, too small to detect with radar but detectable with powerful Earth-based telescopes, are also circling the Earth at an altitude of 200 to 700 miles. This debris poses little danger to us on the Earth, but since it is traveling at average relative speeds of six miles per second, it can severely damage expensive equipment in a collision. This threat was dramatized by a cavity one-eighth of an inch in diameter created in a window of a United States space shuttle in 1983. The pit was determined to have been caused by a collision with a speck of paint traveling at a speed of about two to four miles per second. The window had to be replaced. 

     As more and more nations put satellites into space, the risk of collision can only increase. Measures are already being taken to control the growth of orbital debris. The United States has always required its astronauts to bag their wastes and return them to Earth. The United States Air Force has agreed to conduct low-altitude rather than high-altitude tests of objects it puts into space so debris from tests will reenter the Earth's atmosphere and burn up. Extra shielding will also reduce the risk of damage. For example, 2,000 pounds of additional shielding is being considered for each of six space-station crew modules. Further, the European Space Agency, an international consortium is also looking into preventive measures. 

Which of the following would be the best title for the passage?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 

Alex was ________ enough on becoming a professional sportsman and he didn’t want to listen to anybody else’s advice.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 

     In Germany, it’s important to be serious in a work situation. They don’t mix work and play so you shouldn’t make jokes (25) ______ you do in the UK and USA when you first meet people. They work in a very organized way and prefer to do one thing at a time. They don’t like interruptions or (26) ______changes of schedule. Punctuality is very important so you should arrive on time for appointments. At meeting, it’s important to follow the agenda and not interrupt (27) ______ speaker. If you give a presentation, you should focus (28) ______ facts and technical information and the quality of your company’s products. You should also prepare well, as they may ask a lot of questions. Colleagues normally use the family names, and title - for example “Doctor”; or “Professor”, so you shouldn’t use first names (29) ______ a person asks you to.

It can be inferred from the passage that debris was harmful to one of the space shuttles because the debris was _________

In spite of his poverty, he led a devoted life to the revolutionary cause.

Both universities speak highly of the program of student exchange and hope to cooperate more in the future.

The word “them" in line 11 refers to which of the following? 

     A. astronauts                 B. wastes                       C. tests      D. crew modules

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. 

Jane: “Would you rather have coffee or orange juice?” 

Susan: “______”.