以下15题,麻烦给下答案,顺便简单地解释下为什么这么选.

1.Weagreedtoaccept()theythoughtwasthebestmanager

A.whateverB.whoeverC.whicheverD.whoever

2.Tenmenbandedtogetherinlovecando()tenthousandseparatelywouldfailin.

A.whereB.whatC.whichD.that

3.ThelatestUKofficialstudiesshow()fewerteenagersarenowstudyingforeignlanguages.

A.whatB.whichC.不填D.whether

4.Whatdoctorsreallydoubtis()mymotherwillrecoverfromthisseriousdiseasesoonornot.

A.whenB.howC.whetherD.if

5.Withtheeyesfixedupon()wasleftofDella'shair,jimwaswearingquiteastrangeexpression.

A.whatB.allC.whichD.that

6.ZhengHe'sfirststopwasin()istodayofVietnam.

A.whereB.whichC.thatD.what

7.Beingdeterminedisakingofqualityandthat's()ittakestodoanythingproperly.

A.howB.whichC.whereD.what

8.TryrecordingyourvoiceinEnglish---thismayhelpyoutosee()youcouldimprove.

A.thatB.whereC.howD.when

9.Iwanttomake()clearthatweshoulddoanimportantandnecessaryjob.

A.thatB.thisC.itD.what

10.ThelasttimewesawMissSmithwas()wevisittdherhome.

A.whenB.howC.whereD.why

11.Istilldon'tremember()Icrossedthestreetwiththeredlightstillon.

A.whenitwasthatB.thatiswaswhenC.wherewasitthatD.itwaswherethat.

12.OnereasonIknow()businessisachallengeis()bestguessesmustbewellpreparedintermsofincompleteinformation.

A.which；becauseB.不填；becauseC.that;whyD.why;that

13.Onlywhenenoughattention()totheenvironment()itwillbeimprovedgreatly.

A.pays;onecanexpectB.ispaid;canoneexpectC.paying;canoneexpectD.tobepaid;oneistoexpect

14Whenwecamein,weweresurprisedtofindCarl,thebravestboyinourclass,()atthebackoftheclassroom.

A.weepsB.toweepC.weepingD.wept

15.Garywassuchanhonestboy()weallbelieved()hespokethetruthtous.

A.不填；whateverB.that;whatC.不填;thatD.that;不填