题目内容

11. If you drive from the airport, get on the motorway and follow the____________to the city.

A. signs
B. points
C. plans
D. ways

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12. When you take medicine, be careful not to _____________the dose(剂量) printed on thebottle.

A. match
B. overcome
C. exceed
D. substitute

With China's open policy, a sense of____________has been enhanced in the Chinese people's minds.

A. information
B. competition
C. composition
D. invention

14. It is hard to explain in words_________________.

A. what is a chemical change
B. what a chemical change is
C. how is a chemical change
D. how a chemical change is

Look, she's so upset at what you've said! You_____________more polite.

A. should have been
B. had to
C. may be
D. would be

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