21.Except on official________ such as formal receptions, American society has a certain amount of informality.

　　A) cases

　　B) situations

　　C) events

　　D) occasions

　　22.The final document was, of course, supposed to mend the damage________ upon the world by the war.

　　A) imposed

　　B) impressed

　　C) compelled

　　D) compressed

　　23.While walking along the icy river banks, we could see cracks in the ice________ in all directions.

　　A) radiating

　　B) dividing

　　C) splitting

　　D) tearing

　　24.Tibet, the second largest province of China, is________ in uranium (鈾) and underground thermal power(地?zé)?.

　　A) wealthy

　　B) abundant

　　C) adequate

　　D) sufficient

　　25.The young couple were quite excited by the________ of having their first child.

　　A) perspective

　　B) prospect

　　C) future

　　D) foresight

　　26.So many children have bought the balloons that the store is now out of________ .

　　A) stuff

　　B) material

　　C) stock

　　D) staff

　　27.She was always in perfect sympathy with me________ my love of nature.

　　A) with regard to

　　B) in contrast to

　　C) in case of

　　D) in the event of

　　28.There are nations whose lack of contact with the outside world has________ poverty.

　　A) fallen into

　　B) consisted in

　　C) resulted in

　　D) amounted to

　　29.This is the________ to an improvement of their living conditions.

　　A) key

　　B) decision

　　C) essence

　　D) alternative

　　30.It was bold idea to build a power station in the deep valley, but it________ as well as we had expected.

　　A) went off

　　B) worked off

　　C) broke off

　　D) came off

　　31.Christmas is a Christian holy day usually celebrated on December 25th________ the birth of Jesus Christ.

　　A) in favour of

　　B) in honour of

　　C) in terms of

　　D) in accordance with

　　32.The________ action of the policemen saved the people in the house from being burnt.

　　A) alert

　　B) urgent

　　C) prompt

　　D) punctual

　　33.The pollution question as well as several other issues is going to be discussed when the Congress is in________ again next spring.

　　A) assembly

　　B) conference

　　C) convention

　　D) session

　　34.Your________ is the round of things that you usually do each day.

　　A) practice

　　B) habit

　　C) routine

　　D) custom

　　35.I________ with thanks the help of my colleagues in the preparation of this new column.

　　A) express

　　B) acknowledge

　　C) confirm

　　D) verify

　　36.David is the________ holder of the world 5000-meter race world record, but there is no guarantee that he will win in the Olympic Games.

　　A) prevalent

　　B) dominant

　　C) current

　　D) prominent

　　37.Your complaint is being________ ; when we have anything to report we’ll write to you again.

　　A) looked through

　　B) looked over

　　C) looked after

　　D) looked into

　　38.To our delight, she quickly________ herself to the new situation.

　　A) acquainted

　　B) exposed

　　C) adapted

　　D) devoted

　　39.The manger gave one of the salesgirls an accusing look for her________ attitude toward customers.

　　A) straightforward

　　B) partial

　　C) favourable

　　D) hostile

　　40.With the joint effort of everyone, the plan is________ to succeed; I’m sure of that.

　　A) obvious

　　B) bound

　　C) doubtless

　　D) necessary