求英语高手

Question

in half an hour
after half an hour
an hour later

区别

Answer 1

in half an hour 半小时后：是指将来的某一个具体的时间点；如：He will come here in half an hour.
after half an hour 半小时后：已经发生了的，过去的时间；如：after half an hour, he came back.
an hour later一小时后，特指从现在起一小时后；

选A答案吧

Answer 2

在半个小时内
半个小时之后
一小时后追问

那I hear the plane is goinf to take off------

A.in half an hour
B.after half an hour
C.an hour later
选哪个