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课时提升作业(十四)
必修3 Unit 4
Ⅰ. 单项填空
1. (2013·广安模拟)Measures must be taken to prevent pollution happily.
A. from we live B. for us to live
C. us living D. from our living
2. She has been over his strange letter for several weeks, but she still figures out nothing about it.
A. puzzling B. worried C. troubled D. anxious
3. (2013·巢湖模拟)Our football team will compete against the American team this evening. Let’s go and them , shall we?
A. cheer; up B. join; up
