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1·If you keep them in your heart and don't talk about them with others, you will even fall ill at last.

如果你把它们放在心里，不与别人谈论它们，你最后甚至会生病。

2·If I fall ill, I'll see my doctor.

如果生病了，我会去看大夫。

3·What will happen when she fall ill?

如果她生病了，又会发生什么？

4·Jack looks as if he is going to fall ill.

杰克看上去好像要生病的样子。

5·What if I fall ill while I'm away on holiday?

如果我在放假时生病了怎么办？

6·It is easy for the old to fall ill in winter.

老年人很容易在冬天生病。

7·People often fall ill because of cold weather.

人们经常因为天冷而生病。

8·I am very healthy, and I almost do not fall ill.

我非常健康，我几乎不生病。

9·When pets fall ill, they need to be sent to the special hospital for pets.

当宠物生病的时候，它们需要送去专门的宠物医院。

10·It is said that many students at the school started to fall ill in late 2015.

据说该校的很多学生从2015年底开始生病。