A.uves-write B.have-written C.did-written 5. Weto Ha Noi several times, but last summer we there by train. B.has flown - went D.have flown - went A.flew- - went C.have flown - have gone UNIT 4 1. I never watch ballet, and my sister doesn't_ A.too B.so C.either 2. Teenagers in Viet Nam like K-pop, and they like Korean films_ A.too B.either C.so 3. Classical music is not A.as exciting 4. The villagers are A.as friend as 5.This year's musical A.as good as as pop music. B.as excited C.exciting they were years ago. There is no change at all. B.as friendly as C.different from it was last year. C.different from festival is not_ B.as well as D.did- write D.like that D.however D.more excited D.not as friendly as D.worse