She listened to her favorite rock music while ___ along with the words.A.singing B.sangC.sing D.to sing

分类: 作业答案 • 2022-05-13 22:45:22

问题描述：

She listened to her favorite rock music while ___ along with the words.A.singing B.sang
C.sing D.to sing

答

A.while 后面直接接动词时，要加ing

答

A
while doing something