Duringthepast120years,theworld

During the past 120 years, the world three waves of global economic integration（联合）.

A．witnessed	B．witnesses
C．has witnessed	D．will witness

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— ____.

A．No， 2 hours later	B．Yes， that's a good idea
C．OK， but I can manage	D．No， I don't think so

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— ____.

A．I didn't know he was

B．Yes， it was

C．No， he wasn't

D．Yes， he did

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— ____.

A．I wonder how	B．I don't wonder
C．Sorry， it's out of order	D．No wonder， here it is

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— Goodbye! I'm glad ____ you.
— ____， too.

A．to see; I

B．to have seen; Me

C．to see; Me

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— I ____， but my wife returned from France the moment I was leaving.

A．was going to

B．would

C．did

D．had

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