新概念第一册自学导读 Lessons119-120

2．happen  v.

（1）发生：

How did the accident happen?

事故是怎么发生的？

A strange thing happened to a friend of mine a year ago.

一年之前，一件奇怪的事发生在我的一位朋友身上。

（2）碰巧，恰好（to）：

I happened to meet her on my way home.

在回家的路上，我碰巧遇见了她。

I happen to know that professor.

我正好认识那位教授。

练习答案  Key to written exercises

Lesson 120

A

1  He dropped the vase after he had taken it into the living room.

2  He bought another car after he had sold his old one.

3  He swept the floor after he had dusted everything.

4  She drank the milk after she had boiled it.

5  He turned off the television after he had seen the programme.

6  He went to bed after he had done his homework.

B

1  Yes, I have just seen it. I had never seen it before.

2  Yes, I have just read it. I had never read it before.

3  Yes, I have just tried it. I had never tried it before.

4  Yes, I have just been there. I had never been there before.

5  Yes, I have just written a letter in English. I had never written a letter in English before.

6  Yes, I have just watched this programme. I had never watched this programme before.

C

1  It was too late. He had already painted it.

2  It was too late. She had already dusted it.

3  It was too late. You had already telephoned him.

4  It was too late. You had already corrected it.

5  It was too late. They had already shut it.

6  It was too late. She had already made it.

D

1  I went to the doctor after I had made an appointment.

2  The boss left the office after he had finished work.

3  My wife went out after she had finished the housework.

4  My teacher gave me my exercise book after he had corrected it.

5  My sister went on holiday after she had taken the examination.

6  I bought a new car after I had sold my old one.