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A．If they don't involve any risks.B．If they produce predictable side effects.C．When th

A. If they don't involve any risks.
B. If they produce predictable side effects.
C. When the urgent need for them arises.
D. When tests show that they are relatively safe.

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Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
(27)

A. By greeting each other very politely.
By exchanging their views on public affairs.
C. By displaying their feelings and emotions.
D. By asking each other some personal questions.

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A．Most facilities will be closed.B．Only a few facilities will be closed.C．Most facilit

A. Most facilities will be closed.
B. Only a few facilities will be closed.
C. Most facilities will operate on a reduced schedule.
D. All facilities will be open.

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听力原文：M: I think it's starting to snow.
W: Starting to snow？ The ground's already covered.
Q: What does the woman mean？
(19)

A. The winter has just begun.
B. Once it starts, it'll snow a lot.
C. They're ready for the snow.
D. It has been snowing for some time.

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A．The same person.B．Friends of the speaker.C．Psychology professors.D．Fictional charact

A. The same person.
B. Friends of the speaker.
C. Psychology professors.
D. Fictional characters.

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A．If they don't involve any risks.B．If they produce predictable side effects.C．When th