Half a month passed and the boy all his money, so he had to turn to his friends for help.

Half a month passed and the boy all his money, so he had to turn to his friends for help.
A. ran out
Bran out of
C. ran across
D. ran away with

(答案→)A. ran outB. ran out ofC. ran acrossD. ran away with解析：考查固定词组，ran away with意思“跑了”，ran across意思“跑过”，ran out of意思“跑出来的”，ran out意思“用完”，句子意思“半个月过去了男孩花完了他的所有钱，因此他不得不向他的朋友求助”

我明天再问问老师，叫他解释下这个问题