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The first thing ________ I did was to see if there were any products ________ might help me, but there only seemed to be powders ________ to kill snakes.

A.that; /; designed B.which; that; designed
C./; that; designed D./; which; design
科目 英语   题型 单选题   难度 困难
知识点: 定语从句综合 谓语
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