5、boutaids.shouldbeallowedcanbeused13.Hecanfixthecomputer.→Thecomputerbyhim.14.Studentsmayusethecomputershere.→Thecomputersbystudents.15.Youmustwatertheflowernow.Theflowerbyyounow.canbefixedmaybeusedmustbewatered16.Youshouldwatertheflowernow.→Theflowerbyyounow17.We c
6、an repair this watch in two .18.Weshoulddotheworkassoonaspossible.→Theworkassoonaspossible.Thiswatchcanberepairedintwodaysshouldbewateredshouldbedone19.Youmustpayattentiontoyourpronunciation→Yourpronunciationattentionto(byyou).20.Wecanfinishtheworkintwodays. →Thew