The professor came into the classroom, ____.A．book under armB．a book under armC．

题型：不详难度：来源：

The professor came into the classroom, ____.

A．book under arm

B．a book under arm

C．book under an arm

D．with book under the arm

答案

A

解析

在独立主格结构中，如使用with复合结构，名词前要用冠词或物主代词。