The math problem is too difficult ,I can’t .
A. work out it
B. work it out
C. work them out
D. put it out
网友回答
A. work out it
(答案→)B. work it out
C. work them out
D. put it out
解析：根据语境可知此句含义是这个问题太难了，我做不出来。Work 士是固定的动词短语，表示解决，处理的意思，又因宾语是人称代词，故放在work out的中间，故选B。