It’s a rule for all the students to their places ahead of 5 minutes waiting for the class

问题补充：

It’s a rule for all the students to their places ahead of 5 minutes waiting for the class to be started.

A. take up

B. pick up

C. keep up

D. give up

答案：

(答案→)A. take up

B. pick up

C. keep up

D. give up

解析：考查词组：A．take up占据，从事，开始学习，B．pick up捡起，习得，用很少的钱买，C．keep up保持….不低落，D．give up放弃，句意：所有的学生在上课前5分钟就坐等待上课这是规定。Take up one’s seat就坐，选A。