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