Part IVDirections:In this section, you’ll hear some passages. At the end of each passage, you'll hear some questions. Both the passage and the questions will be spoken only once. After each question, choose the best answer from the four choices marked A, B, C, and D.Questions 15 to 17 are based on the passages you have just heard.[音频]
A. . To design the dependable military rockets.
B. . To have the business travel into space.
C. . To launch the one-man vehicle into space.
D. . To send unmanned vehicle into space.
listen to the recording
A. . It begins on April 9th, 1959.
B. . It is supported by the military.
C. . It is by no means an easy task.
D. . It experiences a series of failures.
listen to the recording
A. . The animal was sent into space by the Army and Air Force rocket.
B. . The animal escaped from the spacecraft before launching.
C. . The animal survived the launch and landed in the ocean.
D. . The animal was carried into flight over the Pacific Ocean.
Questions 18 to 20 are based on the passages you have just heard.
A. . Because we have the chance to succeed.
B. . Because we can earn much money.
C. . Because we can learn much.
D. . Because we can get in touch with a lot of others.
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