30.Stressful environments lead to unhealthy behaviours 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.The problem of the global warming is serious, ________,the sea levels have risen a little.

A. as result　　　　 B. on the contrary　　 C. in consequence　　　 D. in other words

28.Letters to the editor must carry the writer’s full name, which indicates that writers are _____for what they say.

A. considerate　　　 B. reasonable　　　 C. independent　　　　　 D. responsible

27.It was shameful to be found sleeping in class. His classmates’ laughter only_____ his embarrassment.

A. added to　　　　 B. appealed to　　　 C .referred to　　　　　 D. applied to

26.She was not beautiful, she didn’t _______her mother, who was a beauty.

A. like　 　　　　　　　 B .imitate　　　 　 C. resemble　　　　 　　　 D. represent

25.He suddenly saw Sue across his room ,so he ______his way through the crowd to get to her.

A. felt　　　　　　 　　 B. pushed　　 　 C .struggled　　　　　 　　 D. wound

23.Just as the clothes a person wears, the food he eats and the friends with whom he spends his time ,his house ______his personality.

A. resembles　　　　 　 B .strengthens　 　　　 C. reflects　　　　　 　　　 D .shapes

24 Polar explorers have to be extremely______ to bear the climate and other hardships.

A. tough　　　　　 　 B. rough　　　 　 C. difficult　　　　 　　　　 D. brave