单选题Production went down ______ morale was low.A even thoughB whenC butD to

题目
单选题
Production went down ______ morale was low.
A

even though

B

when

C

but

D

to


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参考答案和解析
正确答案: A
解析:
句子表示“当士气低落时,生产量就低”,只有when在此处符合句意,故选B。