It was only after some progress ______ in the use and development of electric cu

游客2023-11-18 21

问题 It was only after some progress ______ in the use and development of electric current that men began to realize the importance and possibilities of magnetism.

选项 A、had been made
B、would have been made
C、has been made
D、was made

答案 A

解析被动语态。make progress in．．．的被动语态是progress is made in...。

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It was only after some progress ______ in the use and development of electric cu

Whenyouthinkofthetremendoustechnologicalprogresswehavemade,it’s

Whatisthetalk’mainlyabout?[br][originaltext]Areelectriccarsthew

Oneofthemostimportantsocialdevelopmentsthathelpedtomakepossible

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Whenyouthinkofthetremendoustechnologicalprogresswehavemade,it’s

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Atthelaterstageofdevelopment,there______newproblemswhichfirstseemedi

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