问题描述：
1,Tom is a boy.(改为一般疑问句) 2,Is this your brother.(
1,Tom is a boy.(改为一般疑问句)
2,Is this your brother.(作否定回答)
3,Those are erasers.(改为单数句)
1,Tom is a boy.(改为一般疑问句)
2,Is this your brother.(作否定回答)
3,Those are erasers.(改为单数句)
问题解答：
我来补答
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