I can't give you an answer before I carefully. [ ] A．am thinking it overB．have thought it over C．thinking it overD．thought it over 题目和参考答案——青夏教育精英家教网—

题目内容

I can't give you an answer before I ________ carefully.

[　　]

A．am thinking it over

B．have thought it over

C．thinking it over

D．thought it over

答案：B
解析：

“在我仔细考虑完之后，才能给你答复”。仔细考虑的动作尚未发生，宜用将来完成时，但在从句中只需用现在完成时即可。

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A
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B
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D
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E
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F
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G
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