用方框中所給的短語(yǔ)填空。

in the dining hall，in class，listen to，in the library，on time

（1）You can't

listen to

listen to

music when you do your homework.
（2）We must listen to the teacher carefully

in class

in class

.
（3）Don't be late.You must be here

on time

on time

.
（4）Of course，you can eat something

in the dining hall

in the dining hall

.
（5）I often read books

in the library

in the library

.