3. If we           (make) adequate preparations,the confer- ence wouldn't have been so successful.

2. Jack is a great talker. It's high time that he           (do) something in- stead of just talking.

1. We           (face) the difficulty together,but why didn't you tell me?

5. 那天我病了，要不然我就参加那次竞赛了。

I was ill that day.          v .

4. 假如你过两天去上海，我现在就可以安排我在那儿的朋友去机场接你。

If you were to visit Shanghai in two days          

3. 要是这台机器情况良好，我们上次就将它用于实验了。

If the machine were in good conditions,               

2. 如果那个男孩今天下午没有被救，他的家人现在就不会如此平静。

               ，his family would not be in peace now.

1. 如果你昨天告诉他的话，他现在就知道怎么做了。

If you had spoken to him yesterday,                .

7. ―Why didn't you help him?

一I would have,otherwise I didn't have the money.

6. Because of your help,I would not have finished the project in time.