人教版七年级下册英语新目标检测Module4Unit2第二题的第二小题怎么写?急.
课文(关于此题的一小段):
Wewon'ttravelbybusorbikeanymore.Everyfamilywillhaveasmallplane.Nomoreexpensivecars---it'llbecheaptotraveleverywherebyplane,notonlyoverland,butalsoovertheseaorevenintospace.Maybethere'llbetrafficjamsintheair.
Whywon'tpeopletravelbybusorbikeinthefuture?
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