题目内容：

Although it's raining hard,______ are still working in the fields
A but they
B and they
C they
D since they

优质解答

C

Although it's raining hard 是让步状语从句, 故不和并列连词 and, but 连用, 排除A, B

这是主从复合句, 前面是让步从句中, 后面是主句, 故不用从属连词since, 排除D


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