问题描述：
DO you have an Art Festival each year ___May?A.in B.on.
oh ,my god!I lost a set of keys .do you see___?
Sorry ,but you can go to the Lost and Found case.
A.them B.they C.their
oh ,my god!I lost a set of keys .do you see___?
Sorry ,but you can go to the Lost and Found case.
A.them B.they C.their
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