The Chinese survey team remeasured（重新测量）Qomolangma successfully ________ May 27，2020．（　　）

A．inB．onC．at

Li Lei and his cousin made some zongzi by ________ during the Dragon Boat Festival．（　　）

A．themB．theyC．themselves

﹣I like ________ best．

﹣So do I． I take singing classes every weekend．（　　）

A．musicB．physicsC．math

﹣ 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

Han Mei， a good friend of mine， ________ me a lot with my English in the past three years．（　　）

A．helpsB．helpedC．has helped