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课时提升作业(二十)
选修7 Unit 20
Ⅰ. 单项填空
1. difficult and challenging the task may be, we must finish it on time, because there is a possibility our work will go down in history.
A. Whatever; that B. However; as
C. Whatever; which D. However; that
2. Don’t to the public when we will start our project.
A. give off B. give away
C. give in D. give back
