________ fire, all exits must be kept clear.

We are making progress every day in computer science and some of the techniques are ______ very soon.

The hall is used _______ special occasions, such as for big dinners or parties.

He has difficulty in remembering lines，but      he is a good actor

—Why didn’t you tell him about the exciting news?
—He rushed out of the room ______ I could say a word.

Many experts in China suggest we should go to some western countries _______ lost cultural relics of the Summer Palace.

How he wishes he had grasped the opportunity to get the position; now he feels sadly his career lies         .

I’m sorry to say that our food is almost _______.We can’t survive if there is no one to help us.

He convinced me ______ the difficulty of the work.

.Although he had to spend lots of money for going to the ball,he accepted the invitation.
the ball was important to him.