need to hurry __ we'll miss our flight.为什么用or?

need to hurry __ we'll miss our flight.为什么用or? we need to build a __ over the river James,there is only one minute l_____,so we need to hurry up. we need water to do many useful thing的同义句改为 we need water__ __ many useful things we didnt need to hurry,there was plenty of time为什么用didnt need to 而不用needn't have done We ____ hurry if we want to arrive in time.A.must B.need C.may D.have to是不是A也对呢 You need to exercise more.=You need __ __. The train has just left when we arrived at the station.We ________.must hurry should have hurried need to have hurried must have been hurrying __ honey do we need?two There _____ no hurry,need there?A.need beB.need to beC.doesn'tD.needs It's still early .we need not hurry可不可以把need改成must为什么？ 根据下列句子及所给单词首字母写出此字母there is one minute l______,so we need to hurry up ---Shall We start right now?---There's no need to hurry.Just___your time.A keep B make C take D spend there are still 30 minutes --------,so we ------ hurry with supper为什么填to go 不填going 为什么填needn't 不填 don't need 填空（句型转换）We need water to do many useful things.We need water __ __many uesful things.__ __是两个空,只能填两个单词= = Everybody __(need) to keeep healthy. we need to make some Having plenty of time,we didn't need to hurry.Having plenty of time ,_______A.we didn't need to hurryB.there was no need for us to hurryC.we needn't to have hurriedD.hurring was not necessary请问为什么呢?