问题
选择题
-Has Sam finished his homework today, Anne?
-I have no idea. But he ________ it this morning.[ ]
A．did
B．had done
C．was doing
D．had done
答案
答案：C
搜题请搜索小程序“爱下问搜题”
-Has Sam finished his homework today, Anne?
-I have no idea. But he ________ it this morning.[ ]
A．did
B．had done
C．was doing
D．had done
答案：C