I didn't understand until he( )on the question.
I didn't understand until he( )on the question.
A、showed
B、elaborated
C、devised
D、simplified
【正确答案】:B
【题目解析】:本题考查动词辨析。show“展示”, elaborate“详细描述”, devise“设计”, simplify“简单化”。句意:直到他详细解释了这个问题,我才明白。故选B。
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