5、15.Youmustwatertheflowernow.Theflowerbyyounow.canbefixedmaybeusedmustbewatered16.Youshouldwatertheflowernow.→Theflowerbyyounow17.We can repair this watch in two .18.Weshoulddotheworkassoonaspossible.→Theworkassoonaspossible.Thiswatchcanberepairedintwodaysshouldbewateredshouldbedone19.Youmustpayatte