Question

_______the exam, the boy was punished by his father. A．No passing B．Having passed C．Not

Answer 1

答案是b.
意思是：“当我路过一家邮局时，我停下来买了一些邮票”。第一个空需要现在分词作时间状语，选“passing”,
第二个空需要目的状语，所以用动词不定式"to
buy"。