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主语是I,you,we,they,books，动词不变主语是he,she,it,a/thebook，动词加s:looks,comes,加es:does,goes,watches改y为I,加es:try-tries,cry-cries,study-studies选择正确的答案：1.Atiger________underthetree.A.isB.amC.are2.Twocupsoftea__________onthetable.A.isB.amC.are3.Thedog_________inthewater.A.playsB.playC.isplay4.Cats________thecake.A.eatsB.eatC.iseat5.I_______abirthdaypartyformycat.A.holdsB.holdC.ishold6.You_________meanicebook.A.givesB.giveC.isgiving7.Myfather_________toShanghaieveryweek.A.goB.gosC.goes8.He________lunchattwelveo’clock.A.haveB.hasC.having9.Littlebabies________fortheirlostthings.A.cryB.criesC.crying10.He________Englishatschool.A.studyB.studiesC.studying