—WhatdoesPM2.5mean?—Itsaprofes

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—What does PM2.5 mean?
—It's a professional ________ indicating the condition of air pollution.

A．term	B．item
C．number	D．mark

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________ can be good at something for 40 years if he doesn't love it.

A．Anybody	B．Everybody
C．Nobody	D．Somebody

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Recycling is one way to protect the environment; reusing is ________.

A．another	B．the other
C．one another	D．one

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Although Rosemary had suffered from a serious illness for years, she lost ________ of her enthusiasm for life.

A．some	B．neither
C．none	D．all

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I've lived in New York and Chicago, but don't like ________ of them very much.

A．either	B．any
C．each	D．another

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It's an eitheror situation —we can buy a new car this year or we can go on holiday but we can't do ________.

A．others	B．either
C．another	D．both

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