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课时提升作业(四十)
Ⅰ. 单项填空
1. (2013·天津模拟)After several rounds of competition, the little girl because of her excellent spoken English and quick response.
A. put out B. picked out
C. broke out D. stood out
2. For years, scientists have been worried about the of air pollution on the Earth’s natural conditions.
A. effect B. result
C. account D. cause
3. Nowadays a large number of college students home and abroad some part-time jobs in their spare time.
A. is doing B. does C. do D. did
