I do every single bit of housework my husband Bob just does the dishes now and then.A. s

问题补充：

I do every single bit of housework my husband Bob just does the dishes now and then.

A. since

B. while

C. when

D. as

答案：

A. since

(答案→)B. while

C. when

D. as

解析：while表示对比，意为“而”。我做每一件家务，而我的丈夫Bob只是偶尔做做菜。