___we will go camping tomorrow depends on the weather.为什么不能用if?只能用whether

___we will go camping tomorrow depends on the weather.为什么不能用if?只能用whether ___we will go to a camp or not depengds on the weather.A.If B.That C.WhereD .Whether, Jim and me are gonna go campin' this weekend.什么语法错误, ___we ___(go)to the zoo tomorrow It is ____raining?I'm afraid I can't go campin A.still B.yet C.already 选哪一个,为什么? how do you ___we go to beijing for holiday? The villagers have already known ___we will do is to rebuild the Bridge I will remember the days ___we spent together fotever.A.when B.which C.on which 介词填空The broom is _ the door,so I can not see it.改错Is there a light on the teacher's head?___Children can't wait open the presents at Christmas.__They will go to Huanghai Park in Wednesday.___We are learning seventh lesson.___ ①Don't try to get off the bus ____it has stoppedA,while B,as C,since D,before②We'll go and see the patient ___we are busyA,even if B.for C.if D.while③---you understang this rule,you will have no further difficultyA,once B,at once C,Only D,only I go.I will go. School starts in the ___We play computer games in the ___let's go to the football____on Saturday. we will visit Australia next year ___we havewe will visit Australia next year ___we have enough time and money.A lest B tillC provided Dunless请问选哪个?并解释原因. the factory ___we will visit next week is not far from here/where in which which to which the factory ___we will visit next week is not far from herewhere in which which to which we will never forget the days ___we spent with your family 这里用on which还是when? 明天早上我们将开始我们的旅行 用英语怎么说?根据中文填空 ___ ___we will start ___ ___. It will be ten years ___we meet again. A.since B.until C.before D.when 选c WHY