一Excuseme，sir．Thisisanonsmokin

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一Excuse me，sir．This is a non-smoking train．
一Oh，sorry．I____ know that．

A．haven’t known	B．hadn’t know
C．didn’t know	D．don’t know

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By hiking, people can __________ nature and enjoy a new kind of life.

A．close to	B．close to the
C．get close to	D．get close to the

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-__________.

A．I went there by bike	B．I'll do my best
C．It was fascinating	D．You are absolutely right

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A．as one third trees	B．as a third many trees
C．one third trees as many	D．a third as many trees

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A．is made	B．is to be made
C．be made	D．had been made

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A．what	B．that
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