There were dirty marks on her trousers ______ she had wped her hands. A.where B.which C.when D.that

题目

There were dirty marks on her trousers ______ she had wped her hands. A.where B.which C.when D.that

答案

这题选A
后面是一个定语从句,从从句结构上看,它的主谓宾是齐全的,所以不缺主谓宾语,而是缺定状补成分.
根据句意,她刚才用裤子擦手,那个地方留下了很脏的痕迹.从句指她擦手的地方,所以应该选where