四、单项填空（共15分，每小题1分）
从下面各题所给的A、B、C、D四个选项中，选择可以填入空白处的最佳选项。
( ) 21. My father is a doctor and ________ works in the hospital near our home.
A. he B. his C. him D. himself
( ) 22. Annie was born ________ July 1996 in Beijing.
A. on B. in C. at D. for
( ) 23. -- ________ did you spend your last holiday?
-- In London.
A. When B. Why C. What D. Where
