Most of these groups teachers and graduate students, but some freshmen join as well.
A. make up
B. is made up
C. consist of
D. is consist of
网友回答
A. make up
B. is made up
(答案→)C. consist of
D. is consist of
解析：
试题分析:考查动词短语。分析结构可知空格处是谓语动词，而由句意可知这些组是由老师和学生组成的，所以选C。consist of“由。。。组成”。 而make up“组成，化妆”；B、D选项形式错误。句意：这些小组中大多数都是由老师和毕业生组成的，但是很多新生也加入。