An excellent teacher is believed to be one who devotes himself to the children but asks for nothing _______.
It was ______ back home from the restaurant ________ he stayed for a whole day.
_____ anyone phone, write down the phone number and tell him I’ll call back later.
The accidents of coal mines are believed ______ hundreds of deaths in China so far.
Tom ______ for 5 years, but he has been leading a new life since he was set free.
Thinking that the students were having an evening class, the teacher left the classroom, _____.