Without the air to hold some of the sun’s heat, the earth at night_____very cold, too cold for us to live.

The public transport system in Beijing is very good now, so there _____be any difficulty in traveling around the city.

He failed in finding the job. I think that he _____to get some
more qualifications before applying for the job.

I don’t really want to make the appointment, I suppose I ____.

Only when ____hard____make your dream come true. 

．—Margaret ______ stay at home all day long in front of the TV.
—That’ s right．She ought to go to the fitness center with us.

He ________ the window of our classroom yesterday because he didn’t come to school．           

. If the water hadn’t been drained out of the mine, no miners _______ alive now.

The light is still on. He _____ to turn it off when he _____ the room.

. ---The train hasn’t come yet. It is half an hour late.
--- Yes. It __________ here at 2:02 as scheduled.