Question

Mary does every single bit of housework ______her husband Bob just does the dishes at times.

   A. since     B. while     C. when     D. as

Answer 1

A    

解析:

       題意：瑪麗什么家務活都干，然而他的丈夫僅僅有時刷刷碗。while 意為“然而，可是”，表示兩相對比。