— Do you know this computer?

— Yes. Last Monday.

A.when he buys B.when will he buy

C.when he bought D.when did he buy

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Going Green

Green is no longer just a color. It is a new way of thinking about the world and a way of living your life. It’s catching on all over the world. More and more people decide to “go green” because they know that we only have one planet to live on. We won’t be able to live on it much longer if we keep wasting energy, and destroying(破壞) our home with air, land, and water pollution.

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