they have to eat a/an ___ meal ,or they will be too late for

hasty,immediate,urgent 分别是:匆忙的,仓促的,轻率的; 即时的;紧迫的,紧要的
此题是搭配问题,列举如下;
Our immediate concern is for/with the families of those who died.
我们当务之急是安抚死者的家属.
Hasty action is to be deprecated.
切不可草率行事.
Don't be hasty.It's not so easy to find another job.
别草率行事.另找一份工作并不容易.
The matter can wait until the next meeting; it's not urgent.
这件事可以等到下次会议处理,不是急事.

hasty [ 'heisti ] . .
a. 匆匆的,轻率的,急忙的
immediate [ i'mi:djət ] . .
a. 立即的,即刻的,直接的,最接近的
urgent [ 'ə:dʒənt ] . .
a. 急迫的,紧要的,紧急的