填空题

If someone you don’t know is said to be a hero, you’re sure what kind of thing he has done.

【参考答案】

N

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问答题

我们在生活中有很多不良习惯，如随地吐痰等。2. 我们应该改掉这些坏习惯，防止疾病的传播。

单项选择题

Which of the following groups would most concern the skyscraper issue

A．Electricians.
B．Environmentalists.
C．City planners.
D．Television viewers.

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