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.
_____ all my colleagues, I’d like to show all my sincere thanks to you for your devotion to our research.
It is typical of him to go to bed without washing his feet, which his roommates can’t _____.
Typhoon Morakot swept across Taiwan on August 8, 2009_____ hundreds of people dead or missing.
_______ many times, he finally understood it.
He was appointed _____ a very important post in the West, where he would improve himself better.