Our headmaster spoke at the parents meeting for one hour without his notes.
A. looking up
B. bringing out
C. referring to
D. learning about
网友回答
A. looking up
B. bringing out
(答案→)C. referring to
D. learning about
解析：短语辨析。A查找；B取出，拿出；C参考，查阅，提及；C了解；句意：我们的校长不看笔记本在家长会上讲了一个小时。根据句意说明C正确。