They had to stay at home yesterday,______?A.hadn't they B.had they C.didn't they D.did they

问题描述:

They had to stay at home yesterday,______?A.hadn't they B.had they C.didn't they D.did they

C,had是have的过去式,如果是they have to do sth.反问时用的是don't they,所以变为过去式应为didn't they?