问题
选择题
---Sorry. I must be off.
---How nice it would be if you_____a bit longer!
A．stay
B．would stay
C．stayed
D．have stayed
答案
答案：C
由句中的“would be”可知, 这是一个与现在事实相反的虚拟语气, 从句要用一般过去式stayed, 故答案为C。
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