题目内容
找出错误之处：
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Let's(A) do their(B)homework(C) this evening(D).
How many teacher(A) are there(B)in(C) your school?
I go to(A) my bed(B) at ten(C) o'clock(D).
----How old(A) are you?
----I'm all right(B), thank you(C). very much(D).
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