选Acost 意思是花多少钱坐飞机去北京旅游
陈述句为it cost you some money to travel to Beijing by plane
B 用take的话应改成How long does it take to travel to Beijing by plane
句式为：it takes sb time to do sth
C spend用法是Sb spend+时间on sth/doing sth
一般不用it做主语
D pay +钱 for sth
且要是人做主语
补充;
1 It took us two hours（ to finish） the work.(finish)
因为句式：it takes sb time to do sth
22 Why not（ have） a drink?(have)
It is too hot
why not do sth 表建议
为什么不喝呢?那太热了