As a matter of fact, they would rather leave for Beijing than _____ in Shanghai.

Only when you have obtained sufficient data （ ） come to sound conclusion.

I didn’t hear （ ） because there was too much noise where I was sitting.

The manager urged his staff not to （ ） the precious opportunity.

_____at the door before you enter the room, please.

When I go out in the daytime I use the bike _____ the car if I can.

These three teachers vary_____their manners of teaching.

It is her beautiful eyes （ ） attract most of the fans.

It is （ ） impossible to work with this noise around.

If you suspect that illness might be serious， you should not （ ） going to the doctor.

It doesn’t matter _____ you pay in cash or by credit card in this store.

It is her beautiful eyes （ ） attract most of the fans.