Now let's think of feedback（反馈）as something _____.A.that we should make to work for usB.we should make work for usC.in which we should make work for usD.we should make work for us in
网友回答
B解析此定语从句有一词组make sth. work for us表示“使之为我们服务”，关系代词作宾语that可省略．A项多了个to．