4.要是我早想到这一点，我就不会做这样愚蠢的事情了。

答案：If I had thought of it earlier，I wouldn't have done such foolish things.

3.明天我要去那里的话，我就带着女儿去。

　 答案：If I went/were to go/should go there tomorrow，I would take my daughter with me.

2.如果我再年轻10岁，我会从头开始的。

　 答案：If I were 10 years younger，I would start all over again.

1.昨天我要知道你的电话号码的话，我就告诉你真相了。

答案：If I had known your telephone number yesterday，I would have told you the truth.

8.My suggestion is that he　　(tell)the news to his father.

答案：(should)tell

7.The officer gave an order that the work　　(finish)before 6 pm.

答案：(should)be finished

6.He hesitated for a moment before kicking the ball，otherwise he would　　(score)a goal.

答案：have scored

5.Without electricity，human life　　(be) quite different now.

答案：would be

4.When a pencil is partly in a glass of water，it looks as if it　　(be) broken.

答案：were

3.It is high time that we　　(begin) our speech.

答案：began/should begin