No one answered when I phoned this morningWhere were you?— I for teeth in the dental clinic

I think students should have mobile phones to call their parents.—_____. They often use them to play games instead.

e is an especially important stage for us, ______we are supposed to go all out to improve ourselves because anything can happen.

I work ______ a teacher in No.1 Middle School.

My father will be back ______ the morningof May 15.