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

发布时间：2020-08-20 07:57:26

David didn’t give up      he had failed in the experiment four times.
A. if
B. while
C. though
D. since

网友回答

A. if
B. while
(答案→)C. though
D. since
解析：考查状语从句。句意“大卫没有放弃，尽管他做实验已经失败四次了。”A引导条件状语从句；B引导时间状语从句；C引导让步状语从句；D引导原因状语从句。故选C。
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