It was quite a long time__________I made it out what had hap

It was quite a long time__________I made it out what had happened.

A．after

B．before

C．when

D．since

贝克鲁兹 1年前已收到1个回答举报

水生519 春芽

共回答了20个问题采纳率：90% 举报

B

在“It+be+时间名词+before/since”从句句型中，连词before与since极易混淆。用before引导时，句意是“过了多久才……”，主句中的be动词为过去时或将来时态；用since引导时，其句意是“自从……以来已经很久了”，主句中的be动词多为现在时（或现在完成时）或一般过去时（此时since从句要用过去完成时）。

1年前

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