6. The greater the population there is in a locality, the greater the need there is for water, transportation, and disposal of refuse.


  7. It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one's meaning.


  8. With modern offices becoming more mechanized, designers are attempting to personalize them with warmer, less severe interiors.


  9. The difference between libel and slander is that libel is printed while slander is spoken.


  10. The knee is the joints where the thigh bone meets the large bone of the lower leg.


巧背英语四级100个句子单词[2]: http://insuns.com/article/17793-1.html