变速齿轮手机安卓版:中小学三级考英语问题 请告诉我原因 39.29
来源:百度文库 编辑:高校问答 时间:2024/05/10 06:34:06
what's peter doing
he is doing his homework which he ___last night
a.ought to do
b.must have done
c.could be done
d.should have done
he is doing his homework which he ___last night
a.ought to do
b.must have done
c.could be done
d.should have done
“他在做应该昨天晚上就做完的作业”,所以,选d。