【题目】Jane can't attend the meeting at 3 o'clock this afternoon because she ______ a class at that time.
A.will teach
B.would teach
C.has taught
D.will be teaching

【答案】D
【解析】句意：简不能参加今天下午3点钟的会议，因为她那个时候在一个班上课。根据句中的时间状语at that time，指代at 3 o'clock this afternoon,表示在将来的某一时刻正在做某事，故用将来完成时。故选D。