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development of agriculture.A.progress B.invention C.introduction D.contribution14.—The air is very fresh in our city. There is less _______ than before.—Yes. The government has taken action to protect the environment.A.wood B.pollution C.noise D.water15.Yancheng Nature Reserve covers an ______ of over 45,000 square kilometers. It is one of the world’s most important wetlands.A.a(chǎn)rea B.object C.space D.population16.—I didn’t have the to go out alone at night when I was a little child.—So did I. But now I’m brave enough.A.courage B.power C.a(chǎn)bility D.chance17.–Could you give me a few ______ on how to spend the ing summer holiday?OK. Let me see.A.hobbies B.knowledge C.suggestions D.information18.— Did Lucy dress herself beautifully at her birthday party?— Yeah, of course. Her white dress caught everyone’s ______.A.celebration B.organization C.introduction D.a(chǎn)ttention19.—Could you take out the rubbish and do the dishes,Tony?—Sure,Mom will be mad if she sees this _________,I think.A.matter B.messC.trouble D.difficulty20.The man next door is a ________ to Bruce. He doesn’t even know the neighbor’s name.A.stranger B.volunteer C.trainer D.teacher21.We should follow our teachers’________ about how to achieve a balance between our study and hobbies.A.decision B.a(chǎn)ttention C.suggestion D.introduction22.This is a ________ of our city. Look! Our school is here.A.map B.music C.name D.team23.—I really admire these scientists in different fields in our country.—I agree. They have made a great ________ to our country, even to the world.A.celebration B.conversation C.contribution D.introduction24.—Sophie, I can carry the heavy bag for you, if you can39。s a very kind________. Thanks a lot.A.promise B.service C.offer D.suggestion25.— Could you tell me more about Chinese ________, Mr. Li?— Sure. For example, we usually eat rice dumplings on the Dragon Boat Festival.A.customs B.services C.symbols D.holidays26.My sister has no sense of ________. She always gets lost in the city streets.A.shame B.duty C.direction D.humour27.—Do you know a Chinese called ChenGao?—Exactly, his ________ makes the whole world shocked and he bees the youngest PHD supervisor(博導(dǎo))in Math area.A.a(chǎn)dvantage B.progress C.a(chǎn)chievement D.a(chǎn)ttention28.— Do you stay up at night and get up late in the morning just like me?— Never. I think you’d better break that_________.A.habit B.project C.a(chǎn)bility D.a(chǎn)dvice29.—Do you know why David went to London last month?—He went there with the ________ of finding a better job as an engineer.A.experience B.condition C.knowledge D.purpose30.The nu