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:

       题意：玛丽什么家务活都干，然而他的丈夫仅仅有时刷刷碗。while 意为“然而，可是”，表示两相对比。