翻译句子。
1. 首先，对我而言，听懂老师的话并不容易。
__________, it wasn't easy for me to understand the teacher.
2. 为什么你不参加英语俱乐部来练习你的英语呢？
__________ join an English club to practice your English?
3. 玛丽靠和朋友合作学习数学。
Mary studies math by __________ friends.
4. 使我惊奇的是，他通过了这次考试。
__________, he passed the exam.
5. 放弃就是浪费时间。
___________ is a waste of time.
6. 学习语音的方法之一是通过听磁带。
One of the ways to learn pronunciation is __________.
7. 我们应如何处理这些文件呢？
How __________ we __________ these files?
8. 她说她总是犯语法错误。
She says that she is always ___________.
9. 他爸爸常以他的漂亮的字为自豪。
His father often ___________ his beautiful handwriting.
10. 我已下决心去改掉坏习惯。
I have to __________ give up the bad habits.