---You look very tired.
---Well, my lessons all the afternoon.
A. I have reviewed my lessons
B. I have been reviewing
C. I reviewed
D. I had reviewed
网友回答
A. I have reviewed my lessons
(答案→)B. I have been reviewing
C. I reviewed
D. I had reviewed
解析：考查时态：句意：--你看起来很累。-- 是，我整个下午都在复习功课。因为是过去到现在一直在做…，可能动作刚刚结束，但是影响还在，象这题中的You look very tired.可以用现在完成进行时，选B。