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reen isn39。t in the office . she_______ to the library . gone B. went go D. has been1My parents ______ Shandong for ten years . A. have been in B. have been to C. have gone to D. have been students have cleaned the classroom, ? A. so they B. don’t they C. have they D. haven’t they1 has Mr White been a member of Greener China since he to China?A. How soon, es B. How often, got C. How long, came D. How far, arrived he arrived at the bus stop, the bus _____ for 20 minutes.A. has left B. had left C. has been away D. had been away factory ____ since the February of 1988. A . has been open B. has opened C. was open D. opened and Rose ____friends since they met in 2000. A. have made B. have been C. made D. have bee mustn39。t_____ until he es back. A. be away B. leave C. be left meeting _____ for a week now. A. has finished B. has ended C. has been over Gao ______ this school for nearly 5 years. A. has been in B. has e to C. has taught ______ a teacher for 4 years