30．In modern civilization, mankind is destroying the planet, all __________ progress.

A. as a result of　　　 　 B. in the name of 　　　

C. in a state of　　　　　　 D. by the side of

29．With the project of animal protection, foxes are becoming more ________ in urban areas.

A. popular　　　　　 　 B. ordinary　　　　　

C. universal　　　　 　　 D. widespread

28．Food safety is ________ important, so the government spares no efforts to prevent food pollution.

　 　A.strongly　 　　　　 　 B. reasonably　　 　　　　

C.highly　　　　　 D. naturally

27．Don’t be so discouraged. If you ________ such feelings, you will do better next time.

A. carry on　　　 B. get back　　　 　

C. break down　　　　 D. put away

26．Modern forms of transportation and communication have done much to ________the isolation 　of life in Alaska.

A. break through?　　　 B. break down 　　　

C.break into?????　 D. break out

25．There was a big hole in the road which ________ the traffic.

A. took up　　　　 　 B. brought back 　　 、

C. kept back　　　　 D. held up