问题
选择题
33. If I_________you would drop in, I would have stayed home waiting for you.
A．have known
B．knew
C．would know
D．had known
答案
答案：D
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33. If I_________you would drop in, I would have stayed home waiting for you.
A．have known
B．knew
C．would know
D．had known
答案：D