摘要： 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
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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
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