Henry Ford’s introduction of the production line greatly reduced the time it took ________．
A.to make a car
B.for buying a car
C.designing a car
D.for a car to repair
网友回答
A解析It takes time to do sth．表示“做某事花费时间”，该句中time后接定语从句，引导词that/which作took的宾语，已省略。