Only after David was asked to pay more attention _____

试题详情及答案解析

Only after David was asked to pay more attention ______ repeating the same mistake.

A．he avoided	B．did he avoid
C．had he avoided	D．he had avoided

答案：B

试题分析：考查倒装句。句意：在大卫刚刚被要求多加注意时，他就避免了犯相同的错误。only放在句首引起倒装，前句用的过去时，因此空中用过去时态。故选B。
考点：考查倒装句