问题补充:
---What’s the matter with John? He has been sitting there for hours.
---A postcard from his father an attack of home-sickness in him.
A. took up
B. set off
C. brought in
D. built up
答案:
A. took up
(答案→)B. set off
C. brought in
D. built up
解析:句意:---John怎么啦?他好几个小时坐在那里。---他父亲的一张卡片引起了他的思乡病。set off引起,出发;take up占据;build up逐步建立,增强。故选B。