下列句子均缺少一个单词，请把正确的句子写在横线上。1. The elephant is heavier the horse.
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2. What is the matter him?
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3. You sad today.
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4. I taller than my sister.
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试题答案
1. The elephant is heavier than the horse.
2. What is the matter with him?
3. You are / look sad today.
4. I am taller than my sister.