问题

On account of the development of theeconomy, the environment is seriously polluted and we must ________ the emission of the carbon dioxide.[ ]

A: cut in
B:AIDU_
C: cut up
D: cut down

正确答案是：

同类题型

Lucy from the USA— No, she from the USA. She comes from the UK.

You’d sound a lot more polite if you make a request________a question.[ ]

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