Henry Ford’s introduction of the assembly line vastly reduced the time it took ______a car.

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问题 Henry Ford’s introduction of the assembly line vastly reduced the time it took ______a car.

选项 A、in making
B、for making
C、on making
D、to make

答案D

解析 take表示“需要,花费(多少时间)”,本题用到的句型是:It takes(…time)to do sth.,其中的time已出现在前面的主句中,因此只需选不定式即可。
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