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1、Book4Unit3Tomorrow’sworld[阅读理解组块练]Ⅰ.阅读理解A(湖南省2018届高三三十四校联考第二次考试)Dodderisanunusualandunwantedplantthatattacksotherplants.Exceptforitsflowers,theplantlookslikespaghetti,akindofnoodlesintheshapeoflongthinpiecesthatlooklikestringwhentheyarecooked.Itsalmostle
2、afless,threadlikestems(茎)hangdownontopofotherplantsthatdodderneedstostayalive.Dodderdoesnotproduceitsownfood.Instead,itstealsfoodfromotherplants.Itfeedsbysuckingjuicesfromtheplantwhichiswrappedaround,oftenmakingitshostveryweakorevenkillingit.Doddercanfin
3、dotherplantsbytheirsmell.Whenayoungdodderplantstartsgrowing,itfollowsthesmellofplantsitprefers,liketomatoplants,potatoplants,orotherfarmcrops.Unlikemostplantsthatusuallygrowinthedirectionoflightorwarmth,adodderplantwillgrowinthedirectionof,forexample,tom
4、atosmell—ifatomatohappenstobegrowingnearby.However,ayoungdodderplantmustfindahostplantquickly.Itnolongerneedsitsrootonceitisattachedtothehostandwrappedaroundit.Ifitcannotcatchasmellofapotentialhostwithinafewdays,itwilldryupanddisappear－evenifthereisplent
5、yofwateraround.Onceitfindsahost,theyoungdodderplantwillattachitselftoitandstartgrowingfaster.Atthatpointthedodderplantwilldropitsroot.Dodderisthusadifficultweedtomanageandarealheadacheforfarmers.Whenitdoesgetoutofhand,doddercangreatlyreduceafarmer'sharve
6、storevendestroycropscompletely.Beforesowingtheirproduce,especiallyfarmersinwarmpartsoftheworldoftenchecktomakesurenounwanteddodderseedshavemixedwiththeircropseeds.Thisisagoodwaytostopdodderplantsfrommakingtheirwaytoacropfieldsecretly.1．Whydoestheauthorme
7、ntionspaghettiinthefirstparagraph?A．Toanalyzethecontentofsomefood.B．Todescribetheshapeofdodderplants.C．Toexplainwherethedodderplantscomefrom.D．Toarguethatdodderplantscanbeused.2．Whatwillhappenifadodderplantstartsgrowingwheretherearenootherplantsaround?A．
8、Itwilldiesoonerorlater.B．Itwillgrowdeeproots.C．Itwillattractotherplants.D．Itwillcovertheentireareaofsoil.3．Whatcanbeinferredfromthepassage?A．Dodderdoesnotproduceitsownfood.B．Doddercanaffectfarmers'income.C．Doddercanonlysur
