题目内容
Peter knocks ________ Uncle Sam's door.And he gives Peter candies
_______ a treat.
A.at;as B.on;of C.at;or D.on;which
答案:A
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题目内容
Peter knocks ________ Uncle Sam's door.And he gives Peter candies
_______ a treat.
A.at;as B.on;of C.at;or D.on;which