1.练习材料

Lesson87 A perfect alibi

'At the time the murder was committed, I was traveling on the 8 o'clock train to London,' said the man.

'Do you always catch such an early train?' asked the inspector.

'Of course I do,' answered the man.' I must be at work at 10 o'clock. My employer will confirm that I was there on time.'

' Would a later train get you to work on time ?' asked the inspector. ' I suppose it would, but I never catch a later train.'

'At what time did you arrive at the station ?'

'At ten to eight. I bought a paper and waited for the train.' 'And you didn't notice anything unusual ?'

' Of course not.'

'I suggest,' said the inspector, 'that you are not telling the truth. I suggest that you did not catch the 8 o'clock train, but that you caught the 8.25 which would still get you to work on time. You see, on the morning of the murder, the 8 o'clock train did not run at all. It broke down at Ferngreen station and was taken off the line.'

2.任务配置:L0 + L4

3.知识笔记

（1）不熟悉的单词

1、alibi  （n）不在犯罪现场

2、inspector （n）探长

（2）相关知识点

1、At the time the murder was commited, the murder was committed 可以看做是定语从句修饰 time。at the time 意为 at the moment when something happened。

2、on time 准时。

3、 the 8.25 指的是 8 点25分的火车。