单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．International children’s projects.
B．Social and environmental projects.
C．Projects for people with no money.
D．Projects involving sports and languages.
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单项选择题
In order to be happy, Wilson tried many ways such us ______.
A．borrowing books on how to become happier
B．trying to keep a sunny smile
C．starting his conversations with "Hello!"
D．trying to have a good rest
单项选择题
A．The workers on the underground platforms were replaced by machines.B．It became the first completely automatic railway in the world.C．A completely automatic line was added to its network.D．Its trains became computer-controlled.
A．The workers on the underground platforms were replaced by machines.
B．It became the first completely automatic railway in the world.
C．A completely automatic line was added to its network.
D．Its trains became computer-controlled.
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