Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of A

Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of A

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Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of American households
had it.
A.beforeB.whenC.afterD.until

答案
A
解析

举一反三

________ excited us was that more than 100 miners trapped in the Wangjialin flooded coal mine were saved alive.
A.ItB.WhatC.AsD.Which

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The news spread quickly through the village ________ the war had ended, ________ made villagers
wild with joy.
A.which; thatB.that; whatC.that; which D.what; which

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24. The Niagara Waterfalls, ______ is shaped like a semicircle, are 670meters wide, and fall 56 meters in an awesome white sheet of water.
A.whatB.whereC.the largest of whichD.in which

题型:不详难度:| 查看答案

____ enters the computer rooms should take off his shoes in order to keep them clean enough.
A.WhoB.WhoeverC.WhatD.Whatever

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We could see the temple quite clearly from _________we lived.
A.whatB.whichC.whereD.that

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