题干
She is _____English teacher.
She is reading _____book.
A：a, an
B：an, a
C：a, a
答案(点此获取答案解析）
B
She is _____English teacher.
She is reading _____book.
A：a, an
B：an, a
C：a, a
定时，又不适用于现实。”这表明：