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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·洛阳模拟)—What made your skin look so terrible?
— to the sunlight for a long time.
A. Because it was exposed B. After being exposed
C. Being exposed D. Exposed
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·西安模拟)The idea of traveling abroad really a lot of Chinese people.
