单句改错
【小题1】In his letter, John told his parents that he has learnt 1,000 Chinese characters.
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【小题2】The puzzled look on his face suggested that he should not know anything about it.
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【小题3】His father warned him that he should be more careful next time.
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【小题4】The mother told her son not climb that high tree in his new coat.
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【小题5】I'll go to the library as soon as I finish what I was doing.
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