21. October 1^st, 2009 witnessed the most impressive National Day military _______ in celebration of the 60th anniversary of the founding of the People's Republic of China.

A. show             B. performance       C. review             D. strike

22. I must leave it to your own _______ to decide whether you should go back to your home town or just stay here with us.

A. awareness         B. judgment         C. conclusion          D. impression

23. As a considerate teacher, he or she must be good at ______ the students’ mind, seeking for the best way to help them with their problems.

A. reading           B. seeing            C. watching           D. realising