求助！！！翻译英语：1．人们发现多吃水果是必要的（find it necessary to)

1. People find it is necessary to eat more fruit.

2. keep these oil from fire

3. After the meeting, he remains sitting there for a long time.

4. You should find out when will they come.

未找到合适的翻译结果，请检查输入的内容拼写或语言类别选择是否正确。