22. Food aid is the key to the problem now.
A. only, solve, discussed
B. alone, solving, being discussed
C. merely, solving, being discussed
D. alone, solve, being discussed
网友回答
A. only, solve, discussed
(答案→)B. alone, solving, being discussed
C. merely, solving, being discussed
D. alone, solve, being discussed
解析：可联系答.案.网客服索取。