1 . As a working mother, Susan doesn’t know how to keep a b_________ between her family and her work. (根据首字母单词拼写)

2 . Scientists have a fairly positive ________ (态度) to the theory. (根据汉语提示单词拼写)

3 . Years of civil war left the country in r_________. (根据首字母单词拼写)

4 . There is an increased ________ (威胁) of infection and disease from polluted waste, and from eating fish that swallowed waste. (根据汉语提示单词拼写)

5 . Noodles are regarded as a s_________ of long life in Chinese culture. (根据首字母单词拼写)

6 . 【课本改编题】
Economic development is necessary if we want to improve society.... and it is not possible to preserve everything from our past as we move towards the future. Finding and keeping the right ______ and the protection of cultural sites can be a big challenge. （根据课文内容填空）

8 . The authorities took effective m______ to reduce crimes, which benefited residents greatly. (根据首字母单词拼写)

9 . The primary f______ of a house is to provide warmth and shelter but not to earn a profit. (根据首字母单词拼写)