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，要不然我就參加那次競賽了。

I was ill that day.          v .

4. 假如你過兩天去上海，我現(xiàn)在就可以安排我在那兒的朋友去機場接你。

If you were to visit Shanghai in two days          

3. 要是這臺機器情況良好，我們上次就將它用于實驗了。

If the machine were in good conditions,               

2. 如果那個男孩今天下午沒有被救，他的家人現(xiàn)在就不會如此平靜。

               ，his family would not be in peace now.

1. 如果你昨天告訴他的話，他現(xiàn)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.