2. 外语
  3. All these days he ______ on his paper.

All these days he ______ on his paper.

admin2013-10-17  39
问题 All these days he ______ on his paper.
选项 A、has worked
B、has been working
C、was working
D、is working
答案B
解析 all this (these) day(s)，month(s)，year(s)等时间状语一般与现在完成时连用，意为“一段时间以来一直在……”，强调动作的持续，不注重结果。
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