[填空题]A make new materials
B preserve wetland and animals
C have clean air
D have clean water
E collect cigarette butts
F collect disposed oil

Joying placed the buckets at all public-access areas to ______.

[填空题]A make new materials
B preserve wetland and animals
C have clean air
D have clean water
E collect cigarette butts
F collect disposed oil

People are grateful to Carter Dunham for his efforts to ______.

[填空题]A make new materials
B preserve wetland and animals
C have clean air
D have clean water
E collect cigarette butts
F collect disposed oil
Joying placed the buckets at all public-access areas to ______.

[填空题]

• A．make new materials
• B．preserve wetland and animals
• C．have clean air
• D．have clean water
• E．collect cigarette butts
• F．collect disposed oil

Joying placed the buckets at all public-access areas to ______.

[单项选择]

How do you meet new people, make new friends, or find out about the latest bands Here in the UK young people have traditionally done their socializing in bars, pubs and clubs. However, there is a new generation growing up that finds it easier to manage their social lives on the net, using free websites like MySpace, Bebo or MSN Spaces.
Welcome to the social networking website, a place where you can present yourself to the digital community and meet other like-minded people.
The most successful social networking website in the UK is MySpace. com. As of July 2006, MySpace is the world’s fourth most popular English-language website, attracting almost 3 million visitors per month. MySpace claims to have 95 million members with 500, 00(3 new members joining the community each week.
So how bas it become so successful Perhaps its secret is in its simplicity. Each new member can build their own page simply uploading photos, videos and MP3 files. Then they de
A. MSN Spaces
B. Pubs & clubs
C. Bebo Spaces
D. MySpace

[单项选择]The government is expected to make new legislations to （　） foreign investment in real estate.
A. manipulate
B. regulate
C. dominate
D. prevail

[单项选择]
Solving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age.
The finding, published in the April 3 issue of Science, could open a new path for the treatment of heart diseases such as heart failure and heart attack, experts say.
"We find that the beating cells in the heart, cardiomyocytes, are renewed," said lead researcher Dr. Jonas Frisen, a professor of stem cell research at the Karolinska Institute in Stockholm, Sweden. "It has previously not been known whether we were limited to the cardiomyocytes we are born with or if they could be renewed," he said.
The process of renewing these cells changes over time, Frisen added. In a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0.45 percen
A. the analysis of cardiac cells
B. the prevention of chronic diseases
C. the treatment of heart disease
D. the study of longstanding mysteries