题目：
用所给单词的适当形式填空。
1. Doctors often tell us _____ ( dnnk) more water every day.
2. He must be_____(hunger). He ate up all the food.
3. They _____(come) here two days ago.
4. They have fun _____(learn) English.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
