4、motherjustnow.16.Thedoctor (say)thechildneededanoperation.17.Thedog (die)twohoursago.18.Tomorrowismyfather’sbirthday.I (buy)apresentforhim.19.Maryisn’tintheclassroom. She herhomeworkyet?(finish
5、)20. you (find)thekeyofyourhouse? KEY:1.haveeaten2.ate3.saw4.bought5.haslost6.hascooked7.washed8.had9.did10.havecleaned11.told12.made13.arrived14.sent15.asked16.said17.died18.havebought19.Hasfinished20.Havefound