As a result of the serious flood，two thirds of the buildings in the area ______.

A harmonious society is like a symphony orchestra—each person contributes a small sound，but when ______ with other sounds，it becomes beautiful music.

In my opinion，keeping dogs should not be banned，but ______ to certain areas.

A health care project can provide treatment ______ half the cost or less，______ the needs of the patient.

The country has acknowledged ______ every means to fight against any possible attack.

______ twice a year，whether it is a car or a truck，is the rule that every driver must obey in this city.

She was the first in our class ______ the mold：instead of getting a job in education，she decided to become an accountant.

_____ money，it remains to be seen whether we can put the idea into practice.

Few houses in the village were left ______after the earthquake.

_____，they set out to break the record for cross­channel swimming.

The children talked so loudly at dinner table that I had to struggle ______.

—Robert is indeed a wise man.—Oh，yes.How often I have regretted ______ his advice!

When ______ different cultures，we often pay attention only to the differences without noticing the many similarities.

A number of new machines were introduced from abroad，______ an increase in production.

He glanced out of the window，______ that the post office was still closed.

He told this to somebody else，not realizing that he ______.

In order to make our city green，______.

I sat until after eleven，______in a book.

Some of the suspects________refused to answer and kept their mouths shut.

With a lot of difficult problems____________ , the manager felt worried all the time.