新概念第一册自学导读 Lessons129-130

练习答案  Key to written exercises

Lesson 130

A

1  He didn't come to work yesterday. He must have been ill.

2  He didn't come to the office this morning. He had to stay a home.

3  I don't think she was Austrian. She must have been German.

4  I lost my pen so I had to buy a new one.

5  He forgot his case so he had to return home.

6  She didn't hear the phone. She must have been sleeping.

B

1  I don't think they were. They can't have been Canadian.

They must have been Australian.

2  I don't think she was. She can't have been Finnish.

She must have been Russian.

3  I don't think they were. They can't have been Japanese.

They must have been Chinese.

4  I don't think they were. They can't have been butchers.

They must have been bakers.

5  I don't think she was. She can't have been a dentist.

She must have been a doctor.

6  I don't think he was. He can't have been a sales rep.

He must have been the boss.

7  I don't think she was. She can't have been seventeen.

She must have been twenty-one.

8  I don't think they were. They can't have been five.

They must have been seven.

9  I don't think he was. He can't have been seventy-six.

He must have been over eighty.

10  I don't think she was. She can't have been fifty-five.

She must have been under fifty.

11  I don't think it was. It can't have been the 17th yesterday.

It must have been the 16th yesterday.

12  I don't think it was. It can't have been Tuesday yesterday.

It must have been Wednesday yesterday.

13  I don't think it was. It can't have been the 19th yesterday.

It must have been the 20th yesterday.

14  I don't think it was. It can't have been cheap.

It must have been expensive.

15  I don't think it was. It can't have been easy.

It must have been difficult.

16  I don't think she was. She can't have been old.

She must have been young.

17  I don't think he was. He can't have been ill.

He must have been tired.

18  I don't think they were. They can't have been listening to the radio.

They must have been watching television.

19  I don't think she was. She can't have been retiring.

She must have been looking for a new job.

20  I don't think they were. They can't have been sitting.

They must have been standing.