It'll be cheap___everywhere by plane.Atravel Bto travel Ctraveling Dtravels 英语选择并说明理由
问题描述:
It'll be cheap___everywhere by plane.Atravel Bto travel Ctraveling Dtravels 英语选择并说明理由
答
to travel
It'll be cheap to travel everywhere by plane.
坐飞机到处去旅游很便宜.
it 是形式主语,真正主语是to travel everywhere by plane.