--Growing population resulted in growing rubbish.
--There is possibility that rubbish ________the major threat to human beings.

— Do you know the West Lake in Hangzhou?
— Yes, this is the third time that I ____ this beautiful city.

This machine_____ .It hasn’t worked for years.

Hurry up!  The train ______. You know it ______ at 8:30 am.

It is said that the software on learning subjects for pupils       in a very practical way.

She hurried to the entrance at which the car _____, and looked forward to seeing her husband.

I _______ online games for two years, but I’ve never regretted giving it up.

It’s true that whoever ____positive for H7N9 will receive free medical treatment from our government without delay.

The past two years _______ a sharp rise in oil price，which adds to the burden of auto transportation industry.

Bob tried to sweet-talk his mother into letting him go out. But when he saw his sweet talk________， he lost his temper.