单项选择题

A．It’s expensive to manufacture.
B．it hasn’t been adequately tested.
C．It damages car engines.
D．it’s dangerous to transport.
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单项选择题
A．She graduated with honors.B．She was good at all school subjects.C．She decided to go on with her study.D．She decided to end her school life forever.
A．She graduated with honors.
B．She was good at all school subjects.
C．She decided to go on with her study.
D．She decided to end her school life forever.
单项选择题
A．He becomes more independent.B．He becomes more challenging.C．He becomes more observant.D．He becomes more optimistic.
A．He becomes more independent.
B．He becomes more challenging.
C．He becomes more observant.
D．He becomes more optimistic.
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