If it__tomorrow,we__to Beijing.A.doesn't rain;will go B.didn't rain;will go

If it__tomorrow,we__to Beijing.A.doesn't rain;will go B.didn't rain;will go if it__tomorrow,i think i'll attend the class 答案为什么是rains而不是rained if we__(catch)the early train , we'd get there by lunch-time. We would have finushed the work if we__(have)time.填had had.为什么? What should we do if it__tomorrow A.should snow B.would snow C.snow D.will snow不是当if表示如果的时候是if it snows么?表示是否该什么时态就什么时态么? we__ back home at four 用适当的时态1.you __（pass）the exam if you __（work）hard2.a fish __（die）if you __（take）itout of water.3.if it__（be）sunny tomorrow,we__（go）hiking.4.the glass vase__（break）if it__（drop）to the ground.5.he hasn't told we__(not have)a holiday last year We__(know) each other since our boyhood we__(hold)a sports meeting next Saturday. she said we__(have)breakfast everyday We__(know)each other very well.We__(know)each other for a long time. If you have__when we__,please call me up.A.any idea;will startB.any idea;startC.no idea;will startD.no idea;start精通英语者请给个答案,（请不要乱给答案,导致误人子弟）补充：前面那句是什么从句？ we__(not see)each other for a long time Lucy asked me what we__(think) about everything. We__(去参加)toTom's birthday party yesterday We__(catch)in the flood for two hours. 英语翻译Don't hurry.we__ __ __ __.