1.我必须为数学考试做准备。
I have to prepare for the math test.
2.恐怕我不能去你的聚会了。我得了流感。
I ‘m afraid I can't go to your party. I got the flu.
3.我今天下午必须去看医生。
I have to go to see the doctor this afternoon.
4.我不得不离开我的朋友们。
I have to leave my friends.
5.我打算练习拉小提琴。
I'm going to practice playing the violin.
望采纳~O(∩_∩)O~
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