〓学英语学到不想睡觉了

题目

〓学英语学到不想睡觉了
It is imperative that you_______________here in time.
A.shall arrive
B.must arrive
C.could arrive
D.arrive
请选择,请说明这题考察什么

答案

D.arrive
楼上解释的imperative 的意思对了
就=nust 的意思
所以
it's imperative that you arrive here in time = you must arrive here in time
imperative that you must .重复了