单项选择题

A. The earth will get even cooler.
B. No species will survive in fifty years.
C. About 30% of all life forms will become extinct by 2050.
D. No sun’s heat can reach the earth at all.
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单项选择题
A. We should spend our money wisely. B. We cannot live without money. C. We are not slaves of money. D. We should learn to save money.
A. We should spend our money wisely. B. We cannot live without money.
C. We are not slaves of money. D. We should learn to save money.
填空题
G
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