单选题My brother _____while I&n

问题补充：

单选题Mybrother_____whileI______.A.reads; was doing my homeworkB.read; did my homeworkC.was reading; was doing my homeworkD.was reading; did my homework

答案：

C解析while 引导的时间状语，两个从句都可以使用进行时，表示同时做某事，故选C