All the classes in this school 60 students though they are of different ages。A. are cons

问题补充：

All the classes in this school 60 students though they are of different ages。

A. are consisted of

B. consist of

C. is made upof

D. make up of

答案：

A. are consisted of

B. consist of

C. is made upof

D. make up of

解析：考查动词短语。句意 虽然他们年龄不同但他们每个班由60个学生。Consist of 由。。组成，无进行无被动。Be made up of 由 。。组成，主语是classes,故谓语动词用复数形式，所以选B项。

考点 :考查动词短语