单项选择题

A．Why species don’t avoid extinction by adapting. B．Why……

A．Why species don’t avoid extinction by adapting.
B．Why species become extinct at the rate they do.
C．Why humans aren’t extinct.
D．How many species aren’t extinct.

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填空题36（）

单项选择题A．He enjoyed using it. B．He left it in the taxi. C．He left it at the airport. D．He lost it on his trip.

A．He enjoyed using it.
B．He left it in the taxi.
C．He left it at the airport.
D．He lost it on his trip.

单项选择题A．There was much more disorder. B．This time the electricity supply failed. C．It was quite unexpected. D．It came in the cool autumn.

A．There was much more disorder.
B．This time the electricity supply failed.
C．It was quite unexpected.
D．It came in the cool autumn.

填空题exerting

单项选择题A．How to prevent children from watching TV. B．How children like frightening TV programs. C．What bad effects TV programs have on children. D．What teachers think of today’s children.

A．How to prevent children from watching TV.
B．How children like frightening TV programs.
C．What bad effects TV programs have on children.
D．What teachers think of today’s children.