【ifit——tomorrowwewillhaveapicnic..A.won'trainB.doesn'trainC.isn'trainingD.n'train.B和C的区别是什么?whatifhe——?A.A.won'tcomeB.doesn'tcomeC.isn'tcomingD.wouldn'tcome..与上题类似..可我也不明白B和C.】

　　ifit——tomorrowwewillhaveapicnic..

　　A.won'train

　　B.doesn'train

　　C.isn'training

　　D.n'train

　　.B和C的区别是什么?

　　whatifhe——?

　　A.A.won'tcome

　　B.doesn'tcome

　　C.isn'tcoming

　　D.wouldn'tcome

　　..与上题类似..可我也不明白B和C.