2. 公务员
  3. We ______ on this project for four hours. Let’s have a rest.

We ______ on this project for four hours. Let’s have a rest.

admin2011-02-02  75
问题 We ______ on this project for four hours. Let’s have a rest.
选项 A、are working
B、have been working
C、worked
D、had worked
答案B
解析 本题考查动词的时态，由“four hours”可知应用完成时态，排除A和C：由“Let’s have a rest”可知工作还没完，因此应该用现在完成进行时。故选B。
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