We are using up our natural resources too quickly and at the same time we are__our environment with dangerous chemicals.

单选题

We are using up our natural resources too quickly and at the same time we are__our environment with dangerous chemicals.

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单选题

The ___(far)away we are from our motherland, the___(much)we miss her.

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单选题

Although we are keen on meeting your requirements, we regret that we are unable to _____ your request to reduce the prices as our prices are closely calculated.

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单选题

to heat nearby,buildings．In Paris,France,some power plants burn almost 2 million metric tons of the cities garbage each year．The amount of energy produced is about the same as would be produced by burning almost a half million barrels of oil．Our fossil fuel supplies are limited．Burning garbage might be one kind of energy source that we can use to help meet our energy needs．This method could also reduce the amount if garbage piling up on the earth．According to the passage,using garbage is______

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材料题

k up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using t

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