问题

Our classroom is very clean. Do you know who__cleaned it﹖
A:was it that
B:it was that
C:was it who
D:he was
B:it was that
C:was it who
D:he was
正确答案是:
同类题型
I could look after ____ when I was five.— Really? I can’t believe it.
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Are you crazy about listening to __________ music?–Yes, it’s my favorite.
______ does Kitty dance? Four times a week. [ ]
The large elephant _______ many elephants _______ looking for food for dinner. [ ]