5. one改为 that　 在这道题中，that用来代替抽象名词，one与the one都是指代可数名词的。

4. how 改为 who　 know后接“疑问词+to do sth”作宾语。blame是及物动词，who表示人，作宾语。

3. that 改为it　 it 指代后面条件句的内容。如果你愿意教我如何使用电脑，我将非常感激。

2. either改为 neither　 所提供的语境是两队都在刻苦训练，双方都不愿意在比赛中失败，要用neither。

1．that 改为it　 it在句子中作形式主语。真正的主语是to keep order in an important football match。　

6．Dr. Black comes from either Oxford or Cambridge, I can’t remember where .

答案解析

5．Life in the city is quite different from one in the country.

4．The mother didn’t know how to blame for the broken glass as it happened while she was out.

3．I 'd appreciate that if you would like to teach me how to use the computer.

2．Both teams were in hard training, either was willing to lose the game.