很多艰苦的工作一直在幕后进行。

A lot of hard work has been going on ___behind ___the ___scenes.

博拉姆女士知道很多幕后发生的事情，这些病人并不知情。

Ms. Bolam knew a lot of things going on ___behind ___the ___scenes, which were not known to the patients.

谈判在幕后进行，以避免公众注意。

The negotiations were conducted ___behind ___the ___scenes to avoid public attention.