题目内容

---Has Tom finished his homework?
---I don’t know.  But he _________ it the whole morning.
A.didB.doesC. was doingD. is doing
C
此题重点考查过去进行时的基本用法。
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网