单项选择题

I was out of town at the time, so I do not know exactly how it______.

[A] was happening
[B] happened
[C] happens
[D] has happened

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单项选择题

Mary and I see each other______, but not as often as we used to.

[A] sooner or later
[B] once in a while
[C] in the end
[D] more or less

单项选择题

-I am sorry. I______at you the other day. -Forget it. It was a bit out of control my self.

[A] should not shout
[B] should not have shouted
[C] must not shout
[D] must not have shouted

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