back英文什么意思,pick什么意思英文

新外研版英语八年级上册 welcome back everyone 同学们,欢迎回来!
外研社三起五册m1u1 did you come back yesterdayppt
let's review finish class back finish then go back to school
back是回来的意思吗
人教pep版三年级下册英语unit1welcomebacktoschoolappt课件含教案