--- I think the waiter has forgotten us. We here for over half an hour! --- I th
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--- I think the waiter has forgotten us. We ________ here for over half an hour!
--- I think you’re right. He probably thinks we have already ordered.
A．are waiting B．have been waiting
C．have waited D．will wait
试题答案
B
解析:
考察时态。现在完成进行时 已经等他足足半个小时，而且是一直在等他