根据汉语意思完成下列句子。

1．张怡宁在2008奥运会上，获得两枚金牌。

   Zhang Yining __________________________ at the 2008 Olympics.

2．上海位于中国的东部。

   Shanghai ______________________________ the east of China．

3．我们应该尽力去帮助我们周围的人。

   We should ______________________________ people around us.

4．我们的教室是你们的四倍大。

Our classroom is ________________________________ yours.

5．很多人学英语，因此他们商业上能取得更大成功。

   Many people learn English so they can _____________________________.

1、1．won two gold medals

2．is located in

3．do our best to help

4．four times as big as

5．have more success in business