프린터물 시험이었는데 정확한 답이 없어서 이번엔.. 괄호안 이 어떻게 바꿔야 되는지 그냥 답만 가르쳐줘 내가 공부 함 해보게... 1. The government requires that a census be taken every ten years (so) accurate statistics may be compiled. 2. In 1975, according to the National Center for Health Statistics, the average life expectancy for people born during that year (is) 72.4 years. 3. Traditionally, the flag is (risen) in the morning and taken down at night. 4. When the silkworm gets through (to lay) its eggs, it dies. 5. Frank Lloyd Wright has been acclaimed by colleagues as (the greater) of all modern architects. 6. Scientists had previously estimated that the Grand Canyon in Arizona (is) ten million years old; but now, by using a more modern dating method, they agree that the age is closer to six million years. 7. The corals can be divided into three groups, two of which (is) extinct. 8. Without alphabetical order, dictionaries would be (impossibility) to use. 9. Jane Addams had already established Hull House in Chicago and (began) her work in the Women's Suffrage Movement when she was awarded the Nobel prize for peace. 10. The extent to which an individual is a product of either heredity or environment (cannot proven), but several theories have been proposed. 11. (Living) in New York, apartments cost more to rent than they do in other, smaller cities. 이 문제 Living 삭제 해버리면 올바른 문장 되지 않아?