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{{B}}Questions 29 to 31 are based on the passage you
have just heard.{{/B}}
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单选题Five hundred critically-iii patients were investigated with the main purpose of ______.
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单选题According to this passage, "Crew Exploration Vehicle" refers to
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单选题Questions 16 to 18 are based on the passage you have just heard.
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单选题 Questions 29 to 31 are based on the passage
you have just heard.
单选题It can be inferred that Los Remos______.
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单选题She packed her bags, then called the airport and made a(n)_________on the last flight out of Los Angeles.
单选题I would like to rent a house, modem, comfortable and ________ in a quite position.
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单选题Diffusion of light in the sky occurs owing to ______.