it's cloudy and it's n____ for you to take a raincoat with you when you go out.(初二的)

问题描述:

it's cloudy and it's n____ for you to take a raincoat with you when you go out.(初二的)

necessary 有必要的.
外面阴天,所以你出门的时候带个雨衣很有必要.