請問這句英文點解呢？

[XXXXXX were then asked to]:

在這裡個then字解作 [然後]。它可以放在這裡是因為在這句前面，XXXXXXX 一定已經被叫去做了些事在先。
例如：
After doing 100 push ups, the police cadets were then asked to run 5 miles up the hill.

其它用法例子：

(1) Pour 1 cup of milk into the pan, and add 2 table spoon of butter, then bring it to a boil.

(2) If you don't listen, you will catch a cold, then you will understand why I always ask you to dress for the weather.

(3) Every now and then, she will bake me a cake.
她久不久就會做個蛋糕給我。

這裡解"跟住, 之後"既意思。
可以用來作句, e.g. She has finished the homework. Then, she watched TV. (她做完功課之後再看電視)

那麼/便/當年/當時/而後/接著/就/乃/則/於是/已/然後