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问题

1——Why is the classroom sodirty?——Sorry, Sir. It_____ yesterday. We forgot to do it.

A:doesn'tclean
B:didn'tclean
C:isn't cleaned
D:wasn'tcleaned
正确答案是:
同类题型

initial stages of postwar, _______ maintainingof cooperative relationship with USA and strengthening Soviet’s interest,Stalin adopted negative attitude to the Communist Party of China.

This morning Tom got up ealier ___ be late for school.

My sister is as ______ as her classmate Joe, so they are good friends.

The chairperson is very modest.He never_________.

Zhengzhou was attacked by such a terrible sandstorm________ few residents had ever experienced before.

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