-----Haven’t you heard the news?
-----What news?
----- Some of the workers are while others are .
A. on the march, on strike
B. on march, on strike
C. on the march, on the strike
D. on the strike, on march
网友回答
A. on the march, on strike
(答案→)B. on march, on strike
C. on the march, on the strike
D. on the strike, on march
解析： be on strike在罢工； be on march在游行。