David didn’t give up ______ he had failed in the experiment four times.A.ifB.whileC.thoughD.since-九年

题目简介

David didn’t give up ______ he had failed in the experiment four times.A.ifB.whileC.thoughD.since-九年

题目详情

David didn’t give up ______ he had failed in the experiment four times.
A.ifB.whileC.thoughD.since
题型:单选题难度:中档来源:不详

答案

C
此题考查连词,though引导让步状语从句,表示尽管。

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