This is the only way that I can think of _______ the problem of water waste in urban areas.

America is a country ________many different nationalities as well as one with foreign immigrants _______ the majority of its population.

The secretary worked late into the night,_______ a long, speech for the president.

Please remain _______;  the winner of the prize will be announced  soon.

______ by Ren Changxia's deeds, many young girls want to be a policewoman in the future.

_________ after a long walk, Kate called and said she couldn't come to the party. 

Written in a hurry, ________________.

The 8.8 quake in central Chile caused widespread damage, destroying lots of buildings and hundreds of thousands of people_______ .

After the Six­Party Talk in Beijing, an agreement was reached _____that North Korea would abandon（放弃）_____ nuclear weapons.

________ his lessons , he failed in the exam. 

________, you need to give all you have and try your best. 

Victor apologized for ________ to inform me of the change in the plan.

She had her watch           on the bus．

The math problem seems very easy, but in fact it is very difficult_______.

-----What did you think of Mount Tai? ------Wonderful. It’s worth ______once again.

－What will today’s talk be about?－In the lecture ______, the professor will tell us something about modern English usage.

 —What made little Tony so unhappy and cry in his room?— ______ to go hiking with his brother.

- What TV programs are you watching these days?- Well, I’d rather read than watch TV. The programs seem ________ all the time.

________ with some research materials, he decided on three possible approaches in his experiment.

_____ to drive after drinking, some drivers are still trying their luck, which is dangerous.