it's ____ to put on the seat belt each time
问题描述：
it's ____ to put on the seat belt each time
答
it's 【important 重要的】 to put on the seat belt each time
每次都系好安全带很重要.
或者
it's 【necessary 必要的】 to put on the seat belt each time
每次都系好安全带很有必要.