I a flu when I was on a spring outing with my classmates.
A. caught up
B. picked up
C. took up
D. brought up
网友回答
A. caught up
(答案→)B. picked up
C. took up
D. brought up
解析：短语辨析，A抓住，赶上；B捡起，无意中得到；C占据，从事于，开始做；D抚养，抚育；呕吐；结合句意可知B正确。句意：当我和同学春游的时候我无意中染上了流感。