21. We all hold _____ belief that those who have ____wonderful sense of humor are more popular.

A. the, a                   B. /, /                           C. the, /                        D. a, the

22. I get ____ in this difficult situation and don’t know what to do.

A. stuck           B. affected                 C. held                      D. concerned

23. I plan to go back home to visit my family during the Spring Festival, but if I can’t get the train ticket, I still have an__________ plan: to visit the museums.

A. accessible          B. alternative             C. absolute                D. available