单项选择题

In the opinion of the author, （）are being destroyed terribly at present.

A．the oceans
B．the atmosphere
C．the rain forests
D．all the above

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相关考题

单项选择题

Why did Wilson regard" the greatest extinction since the end of the age of dinosaurs" to be the depletion of rain forest areas（）

A．The writer did not give his explanation in detail.
B．The rain forests' survival is questionable.
C．It will become warmer and warmer with the depletion of rain forests.
D．Many wild animals and beasts will extinct as result of the depletion of rain forests.

单项选择题

The word "chop down" in the second paragraph means （）

A．clear
B．make rooms for
C．destroy
D．cut down

单项选择题

Though Pasteur was in poor health, he worked hard in order （）

A．to make a living
B．to prevent the dog from rabies
C．to find a good way to cure rabies
D．to protect children from mad dogs