单项选择题

What steps could be taken to improve the air

A．Reduce the amount of nitrogen.
B．Increase the release of oxygen.
C．Reduce nitrous oxide emissions.
D．Stop industrial activities.
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单项选择题
Friends of Animals, Inc. is ________.
A．a tax-funded organization
B．a society which roams the streets
C．a control center for destroying strays
D．an agency interested in animals
单项选择题
Which train will now leave at 11:35
A．The train to Jinan.
B．The train to Zhengzhou.
C．The train to Tianjin.
D．The train to Hangzhou.
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