A number of overseas Chinese has grasped the opportunity to develop their ideas at home.

Zhongguancun is home for the Chinese Academy of Science and some other famous universities.

A. China has long been a leader in the field of genetic research with the aim of improving agriculture.

B.China has long been a leader in the field of genetic research 　　   　　   improving agriculture.

A. Great scientific achievements are the results of years of failure, years of trying.

B.Years of failure, years of trying have 　　   　　   great scientific achievements.

A. The spirit of Zhongguancun has become successful because of the spirit of creativity and scientific skill.

B.The spirit of creativity and scientific skill has 　　   Zhongguancun 　　   　　  .

A. They started the center in the early 1980s.

B.The center 　　   　　   in the early 1980s.

A. Many of great achievements are likely to be born in northeastern Beijing.

B.　　   　　   　　   that many of great achievements will be born in northeastern Beijing.

Whenever we cannot fall asleep 　　   a hot summer night, what troubles us most is that someone is singing Karaoke 　　   a terrible voice.

The picture, 　　   which he paid $1 000, was owned 　　   a famous painter.

　　   the dark street, there was not a person 　　   whom I could turn 　　   help.