―Isthatblackbikeyours?<br/>―No,itisn't,______isgreen. A: My B: Mine C: I D: Me

DoyouknowwhatthemostpopularhobbyisinAmericaNomatterwhereyougointheU.S.,youwillfindoneormoreverygoodgolfcourses.Bothmenandwomen,youngandoldtakepartinthissport.Therefore,you’llbetemptedtobelievethatgolfisthemostpopularhobby.However,itisn’t.

Doyouhavetobuythishat?No,I__________.Itisn’tnecessary. A: needn’t B: mustn’t C: won’t D: don’tneed

Itisn’’tquite_____thathewillbepresentatthemeeting. A: sure B: right C: exact D: certain

Itisn’tthefirsttimethatI_____myselfinanembarrassingsituation. A: havefound B: found C: finds D: wasfound

Itisn’tlikeaducktowatertolearnaforeignlanguage,soyoumuststudyhard. A: quick B: interesting C: easy D: free

.Itisn’training.There’sno________________. A: raining B: rain C: rains D: rained

2.Isthis___magazine?-No,itisn’t.It’s___. A: your,her B: hers,mine C: yours,hers D: your,hers

Practice1<br/>IfchiefexecutivesofleadingU.S.agri-biotechcompanieshavebeensufferingfromheartburnlately,itisn’tbecauseofanythingthey’vebeeneating.Rather,it’stheunsettlingknowledgethatlong-simmeringEuropeananxietiesovergeneticallymodified(g.m.)crops,likeocean-hoppingviruses,arespreadingacrosstheworld.<br/><alone></alone>UnlikeBritons,whoseconcernsaboutwhattheyeathavebeenontheriseeversince“madcowdisease”(eventhoughithadnothingtodowithgeneticengineering),Americanshaveseemedindifferenttog.m.foods.Iffoodmakerscannolongercountonthepublic’sunquestioningacceptanceoftheirproducts,it’snotjustbecauseofactivisttheatricsandshrillagitprop.Withbillionsofdollarsatrisk,thebiotechindustryhasbeguntofightback,formingcorporatealliancesandlaunchingamajorp.r.effortthatincludeslobbying,newresearcheffortstostillpublicfearsandTV,radioandnewspaperads.Sofar,theregulatorshaveapproveddozensofgeneticallymodifiedplantsforhumanconsumption.Butifpublicpressuregrows,itmaybeforcedtogoslowerinthefuture.Onepossibility:theFDAcouldbeginapplyingtog.m.foodsthepowersitalreadyhastoregulatefoodadditives.Byoverreactingtofearsfannedbywell-fedconsumersintheindustrializedworld,foodproducersmightuprootanindustrythatcouldsomedayprovidebillionsofpeopleintherestoftheworldwithcropstheydesperatelyneed.

—we’vespenttoomuchmoneyrecently.<br/>—well,itisn’tsurprising.Ourfriendsandrelatives______aroundallthetime A: arecoming&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B: hadcome C: werecoming&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D: havebeencoming