问题补充:
单选题Whenthewomancamebackhome,shehadnoideahowit____thatherhusbandmetwithtroubleagain.A.came aboutB.came outC.came upD.came across
答案:
A解析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、(彩票)中奖、(太阳)升起;come across偶然遇见、无意中发现。