Travelling by bus is cheaper than travelling by train ?(more)
=> travelling by train is more expensive than Travelling by bus
Giải thích : Vì Travelling by bus rẻ hơn travelling by trainnên travelling by train đắt hơn Travelling by bus, vì expensive( đắt ) là tính từ dài nên khi so sánh hơn phải thêm từ more
