单项选择题

In vain（）try to persuade her to change her plan.

A．we did
B．did we
C．we would
D．would we

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单项选择题
My parents have lived here（）

A．since 1986
B．many years ago
C．for many years ago
D．since 1966 ago
单项选择题
Last month he promised that he（）today, but he hasn't arrived yet.

A．will come
B．would have come
C．would come
D．is coming
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