Перепишите каждое предложение два раза в прошедшем и будущем медли. 1.It is

1. It is quite clear to everybody in his family that he must start getting ready for his exam instead of wasting time.
It was quite clear to everybody in his family that he had to start getting ready for his exam instead of wasting time.
It will be quite clear to everybody in his family that he will have to start getting ready for his exam instead of wasting time.
2. It is impossible to do anything in such a short time. I must ask the chief to put up my report.
It was impossible to do anything in such a short time. I had to ask the chief to put up my report.
It will be impossible to do anything in such a short time. I will have to ask the chief to put up my report.
3. You must listen to the tape recording of this text several times.
You had to listen to the tape recording of this text several times.
You will have to listen to the tape recording of this text several times.
4. He cant join the party because he is busy.
He will not be able to join the party because he will be busy.
He could not join the party because he was busy.