.All the students were listening carefully with their eyes on the teacher.A. fixedB. bein

问题补充：

.All the students were listening carefully, with their eyes on the teacher.

A. fixed

B. being fixed

C. fixing

D. to fix

答案：

A. fixed

(答案→)B. being fixed

C. fixing

D. to fix

解析：考察非谓语动词.句意,所有学生都在认真听见,眼睛看着老师.现在分词表示真在发生的,伴随性的动作,眼睛是fix的动作对象,故用被动语态,选B.