you must answer the questions under at once under应改成什么?为什么?是

you must answer the questions under at once under应改成什么?为什么?是 You must line up _______ the desk.A.on B.at C.in D.under 将 YOU must answer the questions in English 改为祈使句! your shoes are under the bed you must look after ( ) The questions you asked just now are still under _________（d Once we have that under our belts, we’ll look at the two cla Do you know the boy lying under the big tree?为什么是定语? You must ___ to this letter at once.(用answer或reply填空) With you under the mistletoe 什么 do you call the boy under the tree? under the mistletoe什么意思 under the table 什么意思