问题

why didn’t you answer my call yesterdayafternoon— Sorry , I didn’t hear the phone . I ___________asleep.

A:must be
B:must have been
C:could be
D:should have been

正确答案是：

同类题型

Is___mother an English teacher.—Yes,she is.

He seems to be lost in thought. Why?— Because the film _____his memories of his childhood.

Where are you going this Sunday—I’m ________ time with my friends.

_____ from the top of the tower, the south foot of themountain is a sea of trees.

下列各句中,表达得体的一句是