单项选择题

Not for a moment () the truth of your explanation about the event.

A. we have doubted
B. did we doubt
C. we had doubted
D. doubted we

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单项选择题
Last night, in a radio address, the president urged us to subscribe to the Red Cross.()

A. 昨晚，总统极力劝说我们通过广播给红十字会作宣传。
B. 昨晚的广播说，总统极力要求我们为红十字会作宣传。
C. 昨晚总统发表广播讲话，极力要求我们向红十字会捐款。
D. 昨晚在广播里，总统极力要求我们为红十字会捐款。
单项选择题
If he had remembered () the door, this would not have happened.

A. to have been closed
B. to have closed
C. having closed
D. to close
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