—Sandy,is Mr Li in the teachers' office now?
—I am not sure.He ______ be there.
A.mustB.can'tC.mustn'tD.may
Han Mei, a good friend of mine, ________ me a lot with my English in the past three years.( )
A.helpsB.helpedC.has helped
﹣ I hear your uncle and aunt have moved to the countryside.
﹣ Yes. They think the life in the countryside is more ________.( )
A.similarB.boringC.peaceful
﹣I like ________ best.
﹣So do I. I take singing classes every weekend.( )
A.musicB.physicsC.math
Li Lei and his cousin made some zongzi by ________ during the Dragon Boat Festival.( )
A.themB.theyC.themselves
The Chinese survey team remeasured(重新测量)Qomolangma successfully ________ May 27,2020.( )
A.inB.onC.at