We laugh at jokes,but seldom ________ about how they work.[..

We laugh at jokes,but seldom ________ about how they work.[ ]A. we thinkB. think weC. we do thinkD. do we think

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_____ for your brother, I would not have gone to see Mr. Wa..

_____ for your brother, I would not have gone to see Mr. Wang. A.If it is notB.Were it not C.Had it not beenD.If they were not

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Beneath our feet ______ that our life depends on for food an..

Beneath our feet ______ that our life depends on for food and clothing. [ ]A. the earth lay B. the earth lies C. lie the earth D. lies the earth

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.________ all over the hills and around the lake are wild fl..

.________ all over the hills and around the lake are wild flowers of different kinds.A.To growB.GrowingC.GrownD.Grow

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Only when he reached the teahouse ______ it was the same pla..

Only when he reached the teahouse ______ it was the same place he'd been in last year.[ ]A. he realizedB. he did realizeC. realized heD. did he realize

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