the students_____wear their school uniform on their first day at school

题目

the students_____wear their school uniform on their first day at school
为什么选are to而不选is about to
那为什么不选will be to

答案

are to表将来,和will 一样,可以有很长的时间,这里并不强调“马上”
is about to指即将发生的将来,“马上”时间很短暂,如,飞机马上起飞The plane is about to take off.