问题

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

正确答案是：

同类题型

Cindy’s father, Tian Liang ___ as a policeman in the TV show “Daddy, where are we going”.

In his book he deals with a lot of subjects, ________ from education to environmental protection. [ ]

_ _ is really hard __ them to climb Mount Tai.

Yao Ming is_______ excellent player, isn’t it

When shall we start?— Let’s _____ it 8:30. Is that all right? [ ]