2. 专升本
  3. We didn’t finish the work in time. You______us since you were there.

We didn’t finish the work in time. You______us since you were there.

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问题 We didn’t finish the work in time. You______us since you were there.
选项 A、might help
B、should help
C、could have helped
D、must have helped
答案C
解析 句意：我们没有及时完成工作，既然你在那儿，你本应该帮助我们的。该题考查的是情态动词后面跟完成式的用法。could have done表示本来能做而实际没有做，有时用来提出委婉的批评或表示后悔；而must have done则表示对过去发生的事情进行肯定的推测，意为“一定，肯定”。因此，根据句意应该选择C。
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