A-A+
the population is too large Bwe have to take
问题详情
the population is too large, Bwe have to take measures to control the birth rate.
A.Although
B.Since
C.If
D.Until请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
since引导的是原因状语从句，表示“因为，由于”。其他选项与题意不符：although意为“虽然，尽管”，if意为“如果”，until意为“直到??才”，故选B。
