4. I have       (超过) 70 classmates in my class.

3.      (数百万的) butterflies wake up in spring.

2. Mike,John and I are good friends. We always help        (互相) in study.

1. She       (事实上) missed her parents very much.

4. bring...back to...       

 3. at the end of     

2. 做有关……的研究     

1. ……的数量        

5. 当还在英国学习的时候，她在广播里听到了一首充满感情的关于回家的歌曲。

While she was      in England,she      a song        about        on the radio.

4. 当萨拉是一个青少年的时候，她常反抗来自家庭的几乎每件事情。

When Sarah      a teenager,she           almost everything with her family.