We're sure that the environment in our city ______ greatly through our work in the near

future.

A. improved B. was improved C. will be improved

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I think I should keep on the guitar at home.

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According to Luca, the sea is a good place to grow plants because underwater temperatures remain stable, changing little from day to night. The biosphere acts like greenhouses. Inside the air-filled biosphere, fresh water keeps evaporating(蒸發(fā)), providing the plants with a good environment to grow in. “We have already seen the plants, grow faster and better,” Luca says. “And there are fewer storms that can knock down the biosphere during the summer.”

Luca hopes Nemo's Garden will provide a new way of growing crops. “There is not enough land on the Earth,” he says. “And in many developing countries, bad conditions make it difficult for crops to grow.”

Though the project has just started, Nemo's Garden has achieved success and is moving to different areas. “We're going to try growing other plants,” Luca says. “We hope to set up biosphere in other countries. There are many possibilities.”

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I can not ________ _______ after drinking coffee this late.

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If you don't leave now, you _______ ________ the final bus.

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Unless people _________ _______ at once, the environment will be worse.

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