已知A=B×C．如果A一定，那么B和C成______比例；如果C一定，A和B成______比例．

据汉语提示完成下列句子。

1. 首先，当老师给全班讲话时，对我来说不容易听懂。

   __________, it wasn't easy ___________ me to understand the teacher

   when she talked to the class .

2. 于是我决定每堂课都记大量的语法笔记。

    So I ___________ to ___________ lots of grammar ___________ in every class.

3. 当李莉开始做很多的练习时，她的英语进步了。

    Li Li's English ___________ when she started lots of practice.

4. 老师对我们要求很严格。

    Our teacher ___________ is us.

5. 因为她在造完整的句子方面有麻烦，所以她发现学英语很难。

    She found it difficult ___________ English because

    she had ____________ making ____________ sentences.