用所给词的适当形式填空。

    Danny is my friend. He (live) in a rich family. His parents always(give)him lots of pocket money. But Danny always (try) his best(save) money. He has some good ways to do it.

    Danny enjoys(read).He (buy) lots of books since he was young. He tells me he often buys books online, because they're cheaper. And when he has free time, he often goes to bookstores or libraries to do some reading. Last Saturday, he ((invite) me to our city library to read.

    Danny usually (go) to school by bike instead of (take) a bus. Sometimes when it rains or snows, he walks. Danny (become) very healthy and saved much money by these two ways.