单选题______AWhenBSinceCWhileDAs
单选题
______
A
When
B
Since
C
While
D
As
参考解析
解析：
句意：当Cheek博士摄下害羞的人与他人谈话的情景时。这里需要的是一个引导时间状语从句的词，故选择when。
句意：当Cheek博士摄下害羞的人与他人谈话的情景时。这里需要的是一个引导时间状语从句的词，故选择when。
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