单项选择题

In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.

What is the new material().

A. A fuel that burns cleanly.
B. An oil additive that helps cool engines.
C. A material from which filters are made,
D. An insulating material sprayed on engine parts.

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单项选择题
Under the influence of alcohol, people will().

A.have a clear mind and be more aggressive
B.commit self-destructive behavior
C.suffer both natural and unnatural death
D.be more alert and excited
单项选择题
The speaker suggests encouraging others to talk about themselves because()

A. it’s a good way to know each other.
B. it is a means of showing respect.
C. people are passive listeners.
D. people care more about themselves.
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