2.Commonsensetellsusthat…

　　3.Theincrease(change/failure/success)in…mainly(largely/partly)resultsfrom(arisesfrom/isbecauseof)…

　　4.Theincrease(change/failure/success)in…isdueto(owingto/attributableto)thefactthat…

　　5.Manypeoplewouldclaimthat…

　　6.Onemayattribute(ascribe/owe)theincrease(decrease/change)to…,but…isnotbyitselfanadequateexplanation.

　　7.Oneofthereasonsgivenfor…isthat…

　　8.Whatisalsoworthnoticingisthat…

　　9.Therearemany(different/several/anumberof/avarietyof)causes(reasons)forthisdramatic(marked/significant)growth(change/decline/increase)in..First,…Second,…Finally,… 　　10.Thereisnoevidencetosuggestthat…

　　11.Whyare(is/do/did)…?Foronething,…Foranother,…

　　12.AnotherreasonwhyIdisputetheabovestatementisthat…

　　13.Itgivesriseto(leadto/bring/create)ahostofproblems(consequences).

　　14.Therearenumerousreasonswhy…,andIshallhereexploreonlyafewofthemostimportantones.

　　15.Itwillexert(have/produce)profound(far-reaching/remarkable/considerable/beneficial/favorable/undesirable/disastrous)effect(influence)on…

　　16.Amultitudeoffactorscouldaccountfor(contributeto/leadto/resultin/influence)thechange(increase/decrease/success/failure/development)in…

　　17.In1999,itincreased(rose/jumped/shotup)from5to10percentofthetotal(to15percent/by15percent).

　　18.Bycomparisonwith1998,itdecreased(dropped/fell)from10to5percent(to15percent/by15percent).

　　19.Itaccountfor15percentofthetotal.

　　20.Therewere100trafficaccidentsinApril,andincreaseof5percentinafive-monthperiod.

　　21.By1999,only(lessthan/morethan/almost/about/over/asmanyas)threequarters(40percentof/oneoutoffive/oneinfour)collegepopulation(graduates/housewives)asagainst(ascomparedwith)lastyear(1998)preferredto(liked)…