1 . Studies show that people are more________(可能的) to suffer from back problems if they, always sit before computer screens for long hours. (根据汉语提示单词拼写)

2 . Heavy rains were________(应负责任的)for the shortage of vegetables. (根据汉语提示单词拼写)

3 . Folk dances are traditional styles of dancing that come from________(普通的)people. (根据汉语提示单词拼写)

4 . The market has shown ________ (每年的) growth of 20 percent for several years. （根据汉语提示单词拼写）

5 . As far as I am concerned, it is a_________(有挑战性的)role for an inexperienced performer .

6 . Building such a skyscraper is not an easy job; we must have enough _______(专业的)engineers.

7 . I would be _________(感激的) to you if you give me some advice on how to make friends.