The police are________to conclude that thecause of fire had been a cigarette end

Mrs. Liu, can I pass the final exam if I start working hard from now on— Of course. __________.

I’m worried________.–Whatever the result is ,don’t be too hard on yourself.

The driver drove _______ hit at a big tree and the car came to a stop.

The meeting ___________ because of the smog in Northern China last week.— Oh, it’s too bad! We should take action to improve the air quality.