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根据句意和汉语注释,在相应的横线上,写出单词的正确形式。

1.It is not polite to laugh at others’ ________ (缺点), boys and girls.

2.It is ________ (确信的) that the government will take action to prevent the environment getting worse.

3.Last spring, the viruses ________ (扩散) all of the town in a very short time.

4.The scientists are devoting themselves to ________ (开发) plants that can grow on Mars.

九年级英语单词拼写简单题

少年,再来一题如何?
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