问题
连词成句
连词成句，注意单词的大小写及标点符号。
1. happened, what, your, to, arm (?)
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2. cold,a,he,had,horrible (.)
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3. my, mother,a,cold, has (.)
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答案
1. What happened to your arm?
2. He had a horrible cold.
3. My mother has a cold.