promise用法搭配.then 同步執行

promise例句：

The post office has promised to resume first class mail delivery to the area on Friday.

郵局承諾於星期五恢復對這個地區第一類郵件的遞送。

In 1920 the great powers promised them an independent state.

1920年，列強承諾讓他們成為一個獨立的國家。

If you make a promise, you should keep it.

如果做出了承諾，就應該遵守。

While it will be fun, the seminar also promises to be most instructive.

這次的研討會不僅會有趣，而且有可能會頗具啟發意義。

The boy first showed promise as an athlete in grade school.

這個男孩在上國小的時候就初次顯示出成為運動員的'潛力。

He had promised that the rich and privileged would no longer get preferential treatment.

他已經保證富人和特權階層不會再得到優惠待遇。

Promise me you will not waste your time.

答應我，不要浪費自己的時間。

We'll be back next year, he promised.

“我們明年會回來的，”他承諾道。