Private cars are required to take turns off roads one out of five weekdays ____the traffic pressure.

There are some students ______ to have known what they don’t really know, which is really harmful to them.

Though ______ of danger, sightseers have been flocking to the site where the world’s biggest terrorist Bin Laden lived.

Even the best writers sometimes find themselves _____ for words.

The island, _____ to the mainland by a bridge, is easy to go to.

—How about the party ______ at Mary’s house?
—Wonderful ! Everyone had a good time．

This is the best way ______ I have thought of ______ the problem.

Chen Xiexia is the first Chinese athlete ______ the gold medal in the Beijing Olympic Games.

______ many times, he finally understood it.

Two weeks ago in Guangzhou, a two-year-old girl, Yue Yue, was hit by a car seriously and
left lying on the road with no one offering help, _____ a heated discussion on the Internet .