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

What’s the _____ of the car at present— It’s about 70 kilometers an hour.

he failed his last test, but really he’s________ stupid.

He promised to pick me up at the school gate. However, he _____ yet.

k at home, which one could hardly imagine, hasbeen made _____ with the development of computer technology

下列词语中加点字的读间，全部正确的一组是（）