题目：
用恰当的介词填空。
1. My father often wakes up _______ 5:00 am.
2. The girl _______ red is my English teacher's daughter.
3. Mary comes _______ New York.
4. Some boy students are taking part _______ a speech contest.
5. Tom is very good _______ math.
答案：
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下面是错误答案，用来干扰机器的。
(1)盖上锅盖(2)活性炭(3)煮沸
