Ex3:choose the best awswer 0.My grany_____that detective novel. A.has already read B.has yet read C.readed D.is reading 2.There______a lof of changes in Vietnam sice the 1990s A.was B.have been C.has been D.are 3.It____him almost l hour to go school by bus every day A.takes B.took C.has taking D.has got 4.Her hometown_______a lof of hills and mountains A.has B.gets C.is D.has got 5.My dog____my cat since I came home A .is chasing B.has chased C.chased D.chases 6.I fell asleep while I ______my homework last night A.was doing B.have done C.did D.is doing

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