Jane failed the English exam. She must be very sad.Lets go and.A. ring her up B.cheer her

问题补充：

Jane failed the English exam. She must be very sad.

Lets go and.

A. ring her up B.cheer her up C. wake her up

答案：

解析：ring up打电话给;cheer up使……高兴起来；wake up叫醒。句意：简在英语考试中不及格。她一定很伤心。——让我们去让她高兴起来吧。结合语境可知选B。