When John was arrested for drunken driving, he expected to lose his driving license, but he was with a fine.
A. let through
B. let down
C. let off
D. let out
网友回答
A. let through
B. let down
(答案→)C. let off
D. let out
解析：考查短语辨析。句意“当约翰因酒驾被捕时，他有可能会被吊销驾照，但是他被处罚金后释放了。”A“允许通过”；B“使失望”；C“放出，排放；不惩罚，宽恕”；D“泄露，发出，出租”。故选C。