电子课本网 第48页

第48页

信息发布者:
C
C
D
D
C
D
This engineer had no choice but to accept new challenges.
It is necessary for us to work out how long he has been absent 
from class/school.
According to medical research, staying up (late) is harmful 
to our health.
I want to know if you have made progress this term.
As a monitor, if you are not strict with yourself, you can't set a good example.