I go to bed my mother came ...

I ______ go to bed______ my mother came back home.

A. won’t, until B. didn’t, until

C. will, until D./, when

B 【解析】试题分析：句意：直到妈妈回来我才上床睡觉。从句用了一般过去时态，表示事情发生在过去，故主句用一般过去时，not until直到……才……。故选B。考点：考查连词的用法。

考点分析：

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I ______ go to bed______ my mother came ...