6. 這個(gè)數(shù)學(xué)題目太難了，以致于任何人都做不岀。

The maths problem is too difficult .

The maths problem is so difficult  .

5. 如果琳達(dá)不邀請(qǐng)我的話，我是不會(huì)去她的生日聚會(huì)的。

I won’t go to Linda's birthday party if .

I won’t go to Linda's birthday party unless  .

4. 昨晚他直到完成了工作才離開辦公室。

He after he finished his work last night.

He until he finished his work last night.

3. 趕快，否則你要錯(cuò)過(guò)早班車了。

，Or you won’t catch the early bus.

If you ，you will miss the early bus.

2. 努力學(xué)習(xí)，你就能趕上你的同學(xué)。

and you will catch up with your classmates.

If , you will catch up with your classmates.

三、完成句子

1. 在他待在上海期間，他參觀了科學(xué)博物館。

When , he visited the science museum.

During ，he visited the science museum.

12. I found a wallet lying at the corner when I (sweep) the floor yesterday.

11. You can go to your teachers for help when   (have) problems with your studies.

10. You had better not listen to music while you (do) your homework.

9. How many books they (read) since the end of last spring?