______ these tests were being conducted, she was able to read a newspaper.

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问题 ______ these tests were being conducted, she was able to read a newspaper.

选项 A、During
B、On occasion
C、While
D、As if

答案C

解析 本题测试连接词。A选项错误,因为during是介词,其后不能直接跟句子。B选项错误,因为on occasion常用来做状语,通常不直接引导句子。D选项错误,因为as if其后的句子通常需要使用虚拟语气。C选项正确,因为while是连词,可以引导让步状语从句。
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