Question

What the science teacher does and says       of great importance to college students.

A．are

B．is

C．were

D．was

Answer 1

B

试题分析：考查谓语动词单复数，句子作主语时，谓语动词用单数，句子意思“学科老师所做的和所说的对于大学生很重要”，所以选B
点评：句子What the science teacher does and says是个从句，引导词是what，做整个句子的主语，短语of great importance相当于一个形容词important。