单项选择题

What does the passage say about animals' communication

A．They have their advanced language in form of sound.
B．They can express simple feelings such as hunger and pain.
C．Some of them can communicate with people very well.
D．All of them can use sound to express themselves.

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单项选择题

Classified advertising is different from display advertising because ______.

A．all advertisements of a certain type are grouped together
B．it is more distinguished
C．it is more expensive
D．nowadays the classified advertisements are all of the same size

单项选择题

What sort of attitude do people have when they look at classified advertisements, according to the writer

A．They are in the frame of mind to buy anything.
B．They are looking for something they need.
C．They feel lost because there are so many advertisements.
D．They feel the same as when they look at display advertisements.