问题
选择题
The population, one third of which______ farmer workers, ______increasing very fast. [ ]
A. is; are
B. is; is
C. are; is
D. are; are
答案
答案：C
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The population, one third of which______ farmer workers, ______increasing very fast. [ ]
A. is; are
B. is; is
C. are; is
D. are; are
答案：C