34. When his alarm went off this morning, he shut it off, rolled over, and slept for (_____)_ twenty minutes.

42. After the guests left, she spent half an hour (_____)_ the sitting-room.

A. 　 ordering

B. 　 tidying up

C. 　 arranging

D. 　 clearing away

1. Passage Eight Wisdom teeth are normally the last teeth to appear. This usually happens when people are in their late teen years or early twenties—in other words， when they are older and wiser. Wisdom teeth are chewing teeth， at the back of the mouth. They can grow into place normally and never cause a problem. But often there is not enough room for them in the mouth. They might crowd other teeth. Sometimes they even push sideways through the gums (牙床). An impacted wisdom tooth is one that fails to completely rise through the gum—the term is 【erupt】. Wisdom teeth that only partially erupt can leave space for bacteria to enter around the tooth. Infection is a risk in these cases. Wisdom teeth that are not well in place and become impacted are often removed. People should have the placement of their wisdom teeth examined between the ages of sixteen and twenty. X-rays can show wisdom teeth that are below the gums. The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums. Removal is also advised if there is a chance that poorly placed wisdom teeth will damage other teeth. And removal is called for in cases where fluid collects around a wisdom tooth that is partly or fully below the gum. But why do we have wisdom teeth if we often need to get them removed? One theory has to do with our diets. Scientists say the diet of prehistoric humans probably required more chewing teeth. Life was probably alittle rougher on the teeth back then， too. So it was good to have extras. The American Association of Oral and Maxillofacial (上颌面的) Surgeons says young adults are the best candidates for wisdom teeth removal. The group says older patients may be at greater risk for disease in the tissue surrounding the teeth. After surgery， there can be swelling of the gums and face and some pain. Both can be treated with cold wraps and medication (药物治疗). Wisdom teeth will cause problem when ( ) .

A. they are below the gums

B. they have erupted from the gums

C. they don’t have place to grow normally

D. people are at their late teens or early twenties

31. Is this museum (_____)_ our German friends visited the day before yesterday?

A. 　which

B. 　 much more

C. 　 where

D. 　 the one

47. By the time the war (_____), most of the people had already left.

A. 　 broke out

B. 　 broke up

C. 　 intervened

D. 　 happen

47. In () of speed, safety and price, the hi-railway system is perhaps the world’s model 11 railway.

A. 　 terms

B. 　 case

C. 　 need

D. 　 Search

46. It won’t do us any good, but it won’t do us any harm____.

A. 　 too

B. 　 either

C. 　 neither

D. 　 Also

49. It is high time that the international community (_____)_ together to fight against terrorism.

A. 　 Work

B. 　 works

C. 　 worked

D. 　 working

35. You don’t have to pay for your flights: they’re (_____)_ in the price of your holiday.

A. 　 concluded

B. 　 held

C. 　 settled

D. 　 included

43. We were (_____)_ for half an hour in the traffic and so we arrived late.

A. 　 put down

B. 　 broken down

C. 　 help up

D. 　 kept off

46. I got to the airport, (_____)_ that the plane had left ten minutes before.

A. 　 only to find

B. 　 to only find

C. 　 only having found

D. 　 only found