题目内容
The light is still on. He _____ to turn it off when he _____ the room.
A. may forget: leave B. must have forgotten : left
C. may forget : have left D. could have forgotten : left
B
练习册系列答案
相关题目
题目内容
The light is still on. He _____ to turn it off when he _____ the room.
A. may forget: leave B. must have forgotten : left
C. may forget : have left D. could have forgotten : left
B