题目内容
Li Hua goes to school by bike every morning. It's fun and_____ (health).
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It is_____ (expense) to take a taxi in big cities.
The subway is fast, cheap, and almost always on time, but it is often_____ (crowd).
London's Waterloo is the busiest station in England, with over 100 million people_____ (arrive) and_____ (depart) each year.
You must not drive_____ (喝酒之后).
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