All the students were studying in classTom;he was playing football on the playground.A. ex

问题补充：

All the students were studying in classTom;he was playing football on the playground.

A. except

B. besides

C. except for

D. except on

答案：

(答案→)A. except

B. besides

C. except for

D. except on

解析：此句意思是“所有的学生都在教室学习，而Tom在操场踢球”。except 除……之外。