Unit 7 A Christmas CarolSome useful phrases and difficult language points:can, can’t, must, may It ____ be Mr
He has gone to Shanghai
The room is so dirty, it ______________(clean up)
The lights are out
They _____have gone to bed
Someone is knocking at the door
___it be Mr
I am not sure where he is
He _____ be waiting for us
He must be writing a letter to his parents, _______
The ground is wet
It must have rained last night, ______
take one’s place= take ____________ 取代, 就位Who will ___________ since she is ill
Plastics has _________________(代替了钢)in many fields
The meeting will begin ___ a minute
Please ___________
date back to =date _____The teaching building ___________1945
The Great Wall ____ back to the third century BC has been added to many times
______