单项选择题

A．How to produce pollution free bus.
B．How to prevent our environment from being polluted.
C．Whether to ride a passenger bus or a private car.
D．How to reduce the pollutants produced by bus.
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单项选择题
A．The bookshelf won’t fit in the kitchen.B．The man will give the woman some books.C．The man will help the woman a little later.D．The woman needs help in the kitchen.
A．The bookshelf won’t fit in the kitchen.
B．The man will give the woman some books.
C．The man will help the woman a little later.
D．The woman needs help in the kitchen.
单项选择题
The author of this passage is probably a ______.
A．teacher
B．worker
C．manager
D．physicist
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