--Mom, guess what? I’ve won the 1st prize!---This ­­     a celebration! Let’s go to prepare a party．

He is only too ready to help others, seldom, _____ , refusing them when they turn to him.

---I came all the way to inform you of the time and place of the meeting. ---You could have _____ yourself the trouble.

It is required that each restaurant have signs on the walls,saying “ _____ your steps!”.

His voice ____ with anger when he heard her rude words.

It is all agreed that a good education doesn’t_____ a good job.

It is already 10 o’clock. I wonder how it ______ that she was two hours later on such a short trip.

Since our country has so many good table tennis players, we have to ______ the best ones to take part in the game.   

Such a custom came into _______ long ago.

He attends the evening class ____, that is, Monday, Wednesday and Friday.

----- What time is it now?----- _____ my watch, it is 8 o’clock.

Please tell me how global warming _____. I am still in the dark. 

Film has a much shorter history, especially when ______ such art form as music and painting.

As we all know, all living things ________ the sun for their growth.

She can’t get down to work because she was deeply ________ by the news of his death.

It is high time for us to take measures to protect these old traditions and customs before they ___.

--- What do you think of the movie? --- ________, the movie isn’t interesting enough, though lots of money has been spent on it.

-- Do you need any help, Lucy? --- Yes. The job is _______ I could do myself.

This raises questions of cultural relics protection which _____________ to be debated publicly.

After decades of effort, the city is still trying to _____ how to stop smoking in public places.