◎ 题干
Statistics show that in the past three decades grain production around the world has ______ sharply but
it still can't ______ the rapid growth of population, as a result, a lot of people in undeveloped countries
have to go hungry.
[     ]
A. expanded; keep in touch with                  
B. increased; keep pace with   
C. grown; keep up with                        
D. accumulated; catch up with
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◎ 解析
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◎ 知识点
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