问题描述：
2020______,I suppose,and the housing problems for the low-income families could be solved.
20______,I suppose,and the housing problems for the low-income families could be solved.
A.If you double your efforts B.To make some more efforts
C.Some more efforts D.Making greater efforts
为什么选C不选A
20______,I suppose,and the housing problems for the low-income families could be solved.
A.If you double your efforts B.To make some more efforts
C.Some more efforts D.Making greater efforts
为什么选C不选A
问题解答：
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