问题
选择题
When the woman came back home, she had no idea how it ____ that her husband met with trouble again.
A．came about
B．came out
C．came up
D．came across
答案
答案：A
come about“发生”常与how连用，题中it是形式主语，后面的that从句是真正的主语。另外，come out出现、出版、(消息)传开、冲洗、罢工、(颜色或污点)被洗去、结果是(right/wrong)；come up走过来、出现、发生、被提出、( * * )中奖、(太阳)升起；come across偶然遇见、无意中发现。