The old people should _(speak) to poliely._ you _(ask) to join Millie's birthday party?The teachers _ (listen) to carefully by the students at that moment.

问题描述:

The old people should _(speak) to poliely.
_ you _(ask) to join Millie's birthday party?
The teachers _ (listen) to carefully by the students at that moment.

1、be spoken
2、Were asked
3、were listened