I a flu when I was on a spring outing with my classmates.A. caught upB. picked upC. took

问题补充：

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

答案：

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。