30．Stressful environments lead to unhealthy behaviors such as poor eating habits, which _________ increase the risk of heart disease.

　　　 A. by chance　　　　　　　　　 B. in return　　　　　　　　 C. in turn　　　 　　　　　　　　　　　　　　 D. in a row

29．Hundreds of thousands of soccer fans are likely to get their first taste of live 3D viewing during this year's World Cup, the vast majority of them in cinemas　　 at home, according to football body FIFA.

A. more than　　　　　　　　　 B. rather than　　　　　　　　　 C. other than　　　　　　　　　　　　　 D. less than

28．Every child is __________, with their own needs, preferences and talents.

A. productive　　　　　　　　　 B. familiar　　　　　　　　　 C. original　　　　　　　　　　　　 D. unique