1.我找不到我的信用卡。我肯定是把它落家里了。

2.到网球比赛快开始的时候，大雨已经停了。

3.除非你有经验，否则你就得不到这个职位。

4.我把大部分时间花在研究中美文化的差异上。

5.这句话的意思非常清楚，决不会引起任何误会的。

6.我希望在英语学习上能够提供他比现在根多的帮助。

7.穿上外套，否则你会生病的。

8.她的收藏品中增加了一张贝多芬的唱片。

9.我意识到我以前曾经来过这里。

10.如果你继续对每个人都这么无礼，你很快就会发现自己失去一切朋友。

译文：

1.I can‘t find my credit card. I must have left it at home.

2.By the time the tennis match was going to start， the heavy rain had already stopped.

3.You won‘t obtain the position unless you are experienced.

4.Most of my time is spent studying the differences between Chinese and American cultures.

5.The sentence is so clear that it can‘t cause any misunderstanding.

6.I wish I could give him more help than I do in English learning.

7.Put on your coat or you will get ill.

8.She has added a Beethoven to her collection.

9.I am aware of ever having visited here before.

10.You will soon find yourself without any friends at all if you continue to be so rude to everybody.