Whilehewasinvestigatingwaystoi

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While he was investigating ways to improve the telescope, Newton made______ discover which completely changed______man’s understanding of colour.

A．a…不填

B．a…the

C．不填…the

D．the…a

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It was reported that 115 miners in the flooded mine for eight days were pulled out alive at last.

A．trapped

B．being trapped

C．were trapped

D．had trapped

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—Have you heard that Jones, along with her parents, to Hainan for the winter vacation?
— Really? No wonder I haven’t seen her these days.

A．had been

B．have been

C．has gone

D．have gone

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Not until they left school how much their teachers loved them and helped them.

A．they realized	B．did they realized
C．the would realized	D．had they realized

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It’s nice to see you again. What since we last met?

A．have you done	B．had you done
C．have you been doing	D．did you do

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— Shall we take the 10:20 train?
—No. If we took that train, we too late.

A．arrive

B．arrived

C．will arrive

D．would arrive

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