二、单项选择题， 每题1分，共15分。
21. What worried the boy most was _____ to play computer games.
A. his not allowing B. his no allowing C. having not been allowed D. his not being allowed
22. My teacher encouraged me _____ a summer course _____ my English.
A. to take; to improve B. my taking; to improve
C. for me to take; improving D. me to take; to improve
