It is difficult to predict the strong regional variations in the patterns of ______.

A．Chinese is as difficult to learn as English.

B．For women it may not be so difficult to learn.

C．It is the most difficult language in the world .

D．It is difficult to learn.

Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence.Theories （） on the individual suggest that children engage in criminal behavior. （） they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior. through （） with others.Theories focusing on the role of society suggest that children commit crimes in （） to their failure to rise above their socioeconomic （社会经济的）status （） as a rejection of middle-class values.Most theories of juvenile delinquency have focused on children from disadvantaged families, （） the fact that children from wealthy homes also commit crimes.The latter may commit crimes （） lack of adequate parental control.All theories, however, are tentative （尝试性的）and are （） to criticism.

Changes in the social structure may indirectly （） juvenile crime rates.For example, changes in the economy that （） to fewer job opportunities for youth and rising unemployment （） make gainful employment increasingly difficult to obtain.

The resulting discontent may in （） lead more youths into criminal behavior.

Families have also （） changes these years.More families consist of one parent households or two working parents; （）, children are likely to have less supervision at home （） was common in the traditional family （）.This lack of parental supervision is thought to be an influence on juvenile crime rates.Other （） causes of offensive acts include frustration or failure in school, the increased （） of drugs and alcohol, and the growing （） of child abuse and child neglect.All these conditions tend to increase the probability of a child committing a criminal act, （） a direct causal relationship has not yet been established.

1.A.actingB.relyingC.centeringD.commenting

2.A.beforeB.unlessC.untilD.because

3.A.interactionsB.assimilationC.cooperationD.consultation

4.A.returnB.replyC.referenceD.response

5.A.orB.but ratherC.butD.or else

6.A.consideringB.ignoringC.highlightingD.discarding

7.A.onB.inC.forD.with

8.A.immuneB.resistantC.sensitiveD.subject

9.A.affectB.reduceC.blockD.reflect

10.A.pointB.leadC.comeD.amount

11.A.in generalB.on averageC.by contrastD.at length

12.A.caseB.shortC.turnD.essence

13.A.survivedB.noticedC.undertakenD.experienced

14.A.contrarilyB.consequentlyC.similarlyD.simultaneously

15.A.thanB.thatC.whichD.as

16.A.systemB.structureC.conceptD.tradition

17.A.assessableB.identifiableC.negligibleD.incredible

18.A.expenseB.restrictionC.allocationD.availability

19.A.incidenceB.awarenessC.exposureD.popularity

20.A.providedB.sinceC.althoughD.supposing

A．He is starting the course late.

B．The subject is difficult for him.

C．The professor is very reserved.

D．The book is difficult to read.

A．Too slow for a difficult book though just right for a non-serious one.

B．Too slow for a non-serious book but too fast for a difficult one.

C．Too fast for difficult material though just right for a non-serious book.

D．Too fast for a non-serious book as well as a difficult one.

A、more and more difficult

B、much and much difficult

C、much and much more difficult

D、difficulter and difficulter

A.difficult much

B.much difficult

C.enough difficult

D.too difficult

A．From the ones they are familiar with to the difficult ones.

B．From the short ones to the long ones.

C．From the long ones to the short ones.

D．From the ones they are confident of to the more difficult ones.

A.It is difficult to have friendship in the workplace．

B.It is difficult to have friendly environment in the organizations．

C.The organizations are facing the dilemma：creating a friendly workplace and having policies．

D.It is hard to set policies in organizations．

It is difficult to restore investor confidence and financial market credibility.

A．Y

B．N

C．NG

A．It's difficult to find birds for recording.

B．It's difficult to find quiet areas for recording.

C．It's difficult to find animals for recording.

D．It's difficult to find mammals for recording.

A.it

B.that

C.one