The old lady who caught a bad cold complained that the doctor was ______ too much for the treatment given to her．

There, ______ Mrs． Tailor, stretching out to gather her precious eggs laid by her hen．

Professor Li preferred _______ lectures to his students to _______ to meetings on scientific developments.

On August 12,2009, Typhoon Morakot swept across Taiwan island, _____ a lot of villages _____.

—Why does the lake smell terrible? —Because large quantities of water _____.

As we all know,________, the pollution will get worse and worse.

While listening to the concert, the audience is required to remain ______ and keep quiet.

In classes, you’d better understand as much as possible while ______ notes.

It was __________ computer games that cost the young man a lot of precious time that heshould __________ on his lessons．

Mr. Green showed his students some photos ________ at World Expo 2010 Shanghai.

My manager told me ____ the same mistake again or I would be fired. 

I prefer studying English at home ____ the match.

 Along the way children ______ in long wool coats stopped ________ at us.

Two years ago, she bought an expensive mountain bike and then she _____ me _____ one.

I’d prefer __________ at home watching TV rather than ________ out.

____ such a chance, why don't you have a try ?

For many years, ____ animals for carrying food and other supplies from one area to another has been a means of living in Xinjiang Autonomous Region .

--Who would you like to see at the moment?--The man ____Mr.White .

----- What do you think of the advice ______ by our English teacher?----- No one has given me _________. We’d better take it strictly.

What great trouble the boy had           his father to quit smoking!