单项选择题

The main purpose of this passage is ______.

A．to prove that man is a descendent from some higher animal
B．to satirize human greediness
C．to prove that man is superior to other animals
D．to criticize man as a maniac

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单项选择题

Which of the following is true according to the passage

A．Man gathered more money in order to help their helpless fellows.
B．The bees are always trying to get food as much as they can.
C．Most land on the earth is held by legal owners.
D．It is doubtful whether man is the rational animal.

单项选择题

It has been discovered that ______.

A．H5N1 does not transmit among human beings
B．bird flu spreads only among birds
C．H5N1 is a variant of flu virus
D．bird flu adapts easily to other species