当前位置：首页 >
综合英语（一）(00794) > 正文内容
They were playing basketball while I ( ) my homework.
They were playing basketball while I ( ) my homework.
A.did
B.had been doing
C.had done
D.was doing
正确答案是D
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明：本文由翰林刷题小程序授权发布，如需转载请注明出处。