题目内容

You should have watered the flower earlier,      ?
A．shouldn’t youB．didn’t youC．don’t youD．haven’t you
B
考查反意疑问句。句意“你本应该早点浇花的，不是吗？”情态动词+have done表示推测，反意疑问句根据事实来定。本句表示的是过去的事情，应该用一般过去时，故用didn’t。故选B。
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