The boy was doing homework while his motherdinner.A. cooksB. cookedC. was cookingD. will c

问题补充：

The boy was doing homework while his motherdinner.

A. cooks

B. cooked

C. was cooking

D. will cook

答案：

A. cooks

B. cooked

(答案→)C. was cooking

D. will cook

解析：本题的含义为当男孩的母亲正在做饭时，男孩正在做家庭作业，while引导的时间状语从句，和主句时态要保持一致，本题从句应该使用过去进行时，故本题选C。