Only after they had discussed the matter for several hours ___________ a decision.

2023-05-26

A.they reached
B.did they reach
C.they reach
D.do they reach

参考答案:B

本句中only后接的是after引导的条件状语从句。only提前时,主句部分倒装;结合本句的时态可知,B项正确。

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