问题
选择题
—Mum, can I go to the zoo with Jack this weekend?
—When your homework_______, you can.
A．is done
B．was handed in
C．will be completed
D．had been finished
答案
A
考查被动语态。这里是when引导的时间状语从句，故从句中用一般现在时，而作业与做之间是被动关系，故用一般现在时的被动语态。故选A。