问题
选择题
_____ the green hills are there, one need not worry about firewood. [ ]
A. No longer that
B. So long that
C. Unless
D. As long as
答案
答案：D
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_____ the green hills are there, one need not worry about firewood. [ ]
A. No longer that
B. So long that
C. Unless
D. As long as
答案：D