The main reason for the population growth isn't so much a rise in birth rates a fall in death r——青夏教育精英家教网—

摘要： The main 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. A. and B. as C. but D. or

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

A. and; difference B. as; consequence C. but; result D. or; cause

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