问题补充:
You were silly your car, otherwise it wouldn’t have been stolen.
A. not locking
B. to not lock
C. not having locked
D. not to lock
答案:
A. not locking
B. to not lock
C. not having locked
(答案→)D. not to lock
解析:这题考查不定式做原因状语的用法:不定式的否定形式是to前加not。句意是:你没把车锁上真是很笨,否则它就不会被偷了。选D。