Choose the right answer. 在B栏里找出A栏的正确答句，把字母编号写在题前的括号里。（5分)
你想知道有多少把椅子，可以说：
I go to bedten. A. in B. on C. at
Are they teachers? , they are. A. Yes B. No C. Sorry
What are they? They are. A. workers B. doctor C. doctor’s
My nameBetty. A. is B. am C. are
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