单项选择题

A．He’s been in the program for several days.
B．He’s working hard on the program.
C．He works only during the day.
D．He will probably never finish.
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单项选择题
Disappearing forests throughout Latin America, Asia and Africa can cause ______.
A．immediate climate change
B．immediate economic damage
C．more forests fires
D．higher death rate
单项选择题
It is conventionally thought that ______.
A．only rich countries can afford to care about environmental problems
B．developing countries should also be thinking about the environment
C．environmental problems exist only in the rich world
D．rich countries have not paid enough attention to the health of the planet
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