◎ 题干
It's necessary for you _____ the car when you do not use it.

[     ]

A. lock
B. to lock
C. locking
D. locked
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“It's necessary for you _____ the car when you do not use it. [ ]A. lock B. to lock C. locking D. locked …”主要考查了你对  【不定式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。