题目内容

The clever boy made a hole on the wall______________he could see what was happeninginside the house.

A. in which
B. through which
C. at which
D. on which

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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

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

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