4 . 根据语境，选择下框中的单词或者短语的正确形式填空，框中有两个多余单词或短语。

suit        marry        maintain       result in             independence complain     scary        judge          figure out             determine

1. They look ________ actually, as if they are playing with a little bit of fear.
2. ________ people on the basis of their appearance or wealth is unfair.
3. If you are________ to follow your dream, nothing can stand in the way.
4. We are planning to hold a party for our grandparents for their fiftieth anniversary of ________.
5. If you encourage students to express their creative ideas, they will learn to become ________ thinkers.
6. The Challenger disaster that occurred on 28 January 1986________ the deaths of five NASA astronauts and two specialists.
7. All the students are required to dress formally on this occasion, so the boys must wear their________.
8. We received a number of ________ from customers about the lack of parking facilities.

6 . A simple and common method used by many consumers is to ________ (抱怨；投诉) directly to the store manager. （根据汉语提示单词拼写）