The teacher has to the two students as they are always talking in class.
A. pick up
B. set up
C. split up
D. use up
网友回答
A. pick up
B. set up
(答案→)C. split up
D. use up
解析：C 考查动词短语辨析。句意：老师不得不把这两个学生分开，因为他们总是上课说话。pick up“捡起，搭载”；set up“建立，创立”；split up“分开”；use up“用完，用光”。根据句意可知答案为C项。