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单选题英语六级

2016-11-06

A．To explain that dogs' brain are more complex than crocodiles'.

B．To point out that crocodiles can communicate with dogs.

C．To give an example of animals that care for their young.

D．To emphasize that crocodiles have highly developed brains.

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A．Its relatives answer back.

B．The mother repeats the call.

C．The rest of its family waits near water.

D．The mother calls to other adult crocodiles for assistance.

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2 Questions 20 to 22 are based on the recording you have just heard.

A．To remind students of information from a previous lecture.

B．To point out a feature common to all desert plants.

C．To reinforce a point about drought-tolerant plants.

D．To help students understand the concept of adaptation.

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A．The ability to absorb water from dry soil.

B．The ability to absorb water through their leaves.

C．The ability to prevent moisture from being lost through their leaves.

D．The ability to shed their leaves when necessary.

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