2 . 请匹配单词及其英文解释。

A. once a year B. to found or set up C. to happen or exist D. not depend on others E. to give a loud, sharp cry F. a surface where pictures can be viewed G. to deal with something successfully or win it

1. annually
2. overcome
3. occur
4. scream
5. establish

4 . Normal-speed trains play a vital role in railway transport and also serve as an important choice for passengers, transporting over one-third of all railway passengers ____(annual).   (所给词的适当形式填空)