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课时提升作业(二十一)
必修5 Unit 1
Ⅰ. 单项填空
1. (2013·绍兴模拟)I’m writing a letter, expecting your newspaper to_________the public to pay more attention to environmental protection.
A. appeal to B. refer to
C. adapt to D. react to
2. When he came back three hours later, they were still sitting on the sofa, ____________in conversation.
A. absorbing B. absorbed
C. to absorb D. to be absorbed
3. (2013·宁波模拟)_________to nuclear radiation, even for a short time, may influence genes in human bodies.
A. Exposed B. Being exposed
C. To expose D. Having exposed
4. (2013·吉林模拟)You’d better give up smoking, Tom, for many diseases are _________to smoking, you know.
A. linked B. led C. exposed D. blamed
5. The doctor____________you for your cough is sure to____________it.
A. curing; treat B. cures; treating
