There are many students in the classroom. Jim is standing them.A. amongB. betweenC. atD.

问题补充：

There are many students in the classroom. Jim is standing them.

A. among

B. between

C. at

D. on

答案：

(答案→)A. among

B. between

C. at

D. on

解析：among在多个之中；between 在两个之间，多和and搭配使用；at在一点；on在某方面。句意：教室里面有许多学生。吉姆正站在他们中间。结合语境可知下文表示在多个之中，故选Ａ。