Глагол listen - правильный глагол. Его три формы: listen, listened, lestened.
ответ: 1) Their work have been finished (by them) at last.
2) The key was lost yesterday
3) Two telegrams have been sent on Tuesday
4) The doctor shall be sent for us at once
5) This man can be relied on by one
6) The examination results were being discussed by them
7)Have you been asked about it?
8) The actors were met by students at the station
9) Some steps were heard by us suddenly
10) You will be told everything about their studies by them
11) My question hasn't been answered yet
12) The text is being typed by them
13) This book is always asked for by students
Объяснение:
(listen пишется с одной s)