托福写作TPO43独立题目+综合文本.pdf

在托福写作练习过程中，相信TPO材料中的作文题目都会是大家的首选练习材料。所以小
编给考生们带来了托福写作TPO43，希望可以帮助广大托福考生轻松备考托福。

托福TPO43综合写作阅读文本

Agnostidswereagroupofmarineanimalsthatbecameextinctabout450

millionyearsago.Agnostidfossilscanbefoundinrocksinmanyareasaround

theworld.Fromthefossilremains,weknowthatagnostidswereprimitive

arthropods-relativesofmodern-dayinsects.However,thefossilinformationdoes

notallowpaleontologiststodeterminewithcertaintywhatagnostidsateorhow

theybehaved.Thereareseveraldifferenttheoriesabouthowagnostidsmayhave

lived.

Free-SwimmingPredators

First,theagnostidsmayhavebeenfree-swimmingpredatorsthathunted

smalleranimals.Itisknownthatothertypesofprimitivearthropodswere

strongswimmersandactivepredators,soitisreasonablethattheagnostidsmay

havelivedthatwayaswellAndwhiletheagnostidsweresmall,sometimesjust

sixmillimeterslong,therewereplentyofsmallerorganismsintheancient

oceanforthemtopreyon.

SeafloorDwellers

Second,theymayhavedwelledontheseafloor.Again,thereareexamplesof

othertypesofprimitivearthropodslivingthisway,soitispossiblethat

agnostidsdidtoo.Ontheseafloortheywouldhavesurvivedbyscavengingdead

organismsorbygrazingonbacteria.

Parasites

Third,thereisthepossibilitythattheagnostidswereparasites,living

onandfeedingofflargerorganisms.Onereasonthatthisseemspossibleisthat

therearemanyspeciesofmodern-dayarthropodsthatexistasparasites,suchas

fleas,ticks,andmites.Theagnostidsmighthavelivedonprimitivefishor

evenonother,largerarthropods.

Directions:Youhave20minutestoplanandwriteyourresponse.Your

responsewillbejudgedonthebasisofthequalityofyourwritingandonhow

wellyourresponsepresentsthepointsinthelectureandtheirrelationshipto

thereadingpassage.Typically,aneffectiveresponsewillbe150to225

words.

托福TPO43独立写作

Question:

Summarizethepointsmadeinthelecture,beingsuretoexplainhowthey

challengethespecifictheoriespresentedinthereadingpassage.

Directions:ReadthequestionbelowYouhave30minutestoplan,write,and

reviseyouressay.Typically,aneffectiveresponsewillcontainaminimumof

300wor