单项选择题

A．Most people don’t think it is a serious problem.
B．Most of our pollution is caused by things people need.
C．The government has not spent enough money to stop it.
D．The seriousness of pollution has not been realized by the government.
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单项选择题
A．Because she didn’t know how to use the new oven.B．Because there was something wrong with her oven.C．Because she wanted to have her refrigerator fixed.D．Because there is something wrong with the food.
A．Because she didn’t know how to use the new oven.
B．Because there was something wrong with her oven.
C．Because she wanted to have her refrigerator fixed.
D．Because there is something wrong with the food.
填空题
Materials that are not permitted to be buried in landfills should be dumped at______.
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