Onlyinrecentyearsbeguntorealiz

Only in recent years ______ begun to realize that wild dogs, kept within bounds, often do more good than harm.

A．people have

B．since people have

C．have people

D．people who have

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相关试题

_____, the subject was always in my mind.

A．Walking or sleeping

B．Walking or slept

C．Having walked or slept

D．To walk and sleep

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As I will be away for at least a year, I’d appreciate _____ from you now and then so that I can know how everyone is getting along.

A．having heard	B．to hear
C．hearing	D．being heard

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The thief fell to the ground, his left foot _____ and blood _____ down from his mouth.

A．breaking; running	B．broken; running
C．breaking; run	D．broken; run

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You can’t imagine what great trouble they have _____ the problem _____.

A．to solve; being talked about

B．solving; discussing

C．to solve; to talk about

D．solving; being discussed

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In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.

A．it marked

B．marking

C．marked

D．to mark

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