问题补充：
-----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
答案：
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： on march游行；on strike罢工。
