问题
选择题
---Has Tom finished his homework?
---I don’t know. But he _________ it the whole morning.
A．did
B．does
C． was doing
D． is doing
答案
答案：C
此题重点考查过去进行时的基本用法。
搜题请搜索小程序“爱下问搜题”
---Has Tom finished his homework?
---I don’t know. But he _________ it the whole morning.
A．did
B．does
C． was doing
D． is doing
答案：C
此题重点考查过去进行时的基本用法。