题目内容
I don’t know when my son back, but when he back, I’ll call you.
| A．comes；comes | B．will come；will come |
| C．comes；will come | D．will come；comes |
D
解析试题分析：句意：我不知道我儿子什么时候回来,但当他会来的时候我会给你打电话.第一句话中when是提问 何时的意思,用将来时;第二句话中when是当……的时候，主将从现。结合句意，故选D。
考点：考查连词的用法
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