It is impolite____(laugh)at the peoplein trouble怎么填

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It is impolite____(laugh)at the peoplein trouble怎么填

It is impolite____(laugh)at the peoplein trouble怎么填
It is impolite____(laugh)at the peoplein trouble怎么填

It is impolite____(laugh)at the peoplein trouble怎么填
to laugh/laughing 第一个是it is v. to do sth.第二个是laughing 作主语,句子在impolite后面断,好像表示不同的状态,我认为这两个都行,但第二个不标准,若第二个应是laughing at the people in trouble is impolite,就这么说还应该填第一个to laugh