从下面所给出的词汇中选择恰当的词汇，用正确的形式填空，每空只填写一个词，其中有2个多余的词汇。（每小题1分，共10分）

urgent   organize    stand    challenge  quality  awful social   pressure    explore   wave     found   promote

1. Many parties are           before Christmas by the students to celebrate the new year.

2. My car is in         need of repair. I can’t even start it today.

3. While I was wondering where to look for my friends, they          at us from the other side of the road.

4.        problems, such as unemployment and education, have drawn much public attention.

5. The supermarket has many activities to      its sales of products.

6. I don’t want to put          on you to make a decision, but we haven’t much time left.

7. The organization.          in 1935 in Ohio, is now famous world-wide.

8. In order to improve your language study, you need to       ways of learning until you find a suitable one.

9. The company is now in a serious financial problem, which is the greatest      in its history.

10. After several years of hark work, the air—has been improved a lot in the city.