单项选择题

According to the passage, which of the following four groups of garbage is ready for burning

A．food scraps and metals
B．paper and glass
C．metals and glass
D．food scraps and paper

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单项选择题

All of the following are the results of burning garbage EXCEPT ______

A．the heat produced is used to boil water
B．the steam produced is used to make electricity
C．the garbage burned is turned into fossil fuels
D．the steam produced is used to heat buildings

单项选择题

The dog probably whines in the presence of death because he can ______.

A．sees ghosts and spirits
B．hold supernatural powers
C．sense unhappiness around him
D．perform astonishing feats

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