单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Planktons are too small to be seen.
B．Most planktons have transparent tissues.
C．Most planktons are practically invisible to predators.
D．Planktons are fascinating organisms.
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单项选择题
A．Four contestants failed to win prizes.B．The man ate during the show.C．The woman missed the show.D．Five contestants won cars.
A．Four contestants failed to win prizes.
B．The man ate during the show.
C．The woman missed the show.
D．Five contestants won cars.
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A．The lack of a real form of government structure.B．The creativeness of Eskimos.C．The excitement of a legal system with strict laws.D．The strong judicial powers of a headman.
A．The lack of a real form of government structure.
B．The creativeness of Eskimos.
C．The excitement of a legal system with strict laws.
D．The strong judicial powers of a headman.
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