The chief reason for the population growth isn’t so much a rise in birth rates a fall in death rates as a result of improvements

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问题 The chief reason for the population growth isn’t so much a rise in birth rates a fall in death rates as a result of improvements in medical care.

选项 A、but
B、or
C、as
D、and

答案C

解析 本题中要特别重视的是so much的出现,这就要求正确的选项应该能够与之相呼应,构成合理的搭配。可以看出,能够满足这种搭配关系的选项只有C。
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