1 . 对您的大力协助，我谨代表我们公司表示衷心的感谢。
I wish to express our heartfelt thanks to you for your gracious assistance _______ _______ _______our company.

2 . 1405年至1433年间，郑和代表明朝共出航七次。
Between 1405 and 1433, __________ __________ __________ the Ming Dynasty, Zheng He made a total of seven voyages.

3 . Between 1405 and 1433, _______ _______ _______ the Ming Dynasty, Zhen he made a total of seven voyages.
1405~1433年间,郑和代表明朝总共进行了7次航行。