问题补充：
It was surprise that my first teacher, already 90, was still living and in good health.
A. the; a
B. /; a
C. a; /
D. a; the
答案：
A. the; a
B. /; a
(答案→)C. a; /
D. a; the
解析：考查冠词的选择。a surprise 一件让人吃惊的事，是抽象名词具体化；in good health 是固定短语，意为“身体好”。句意：我的启蒙老师都90岁了，还活着很健康这是件惊讶的事情。选C。
