6 I haven't gone to the cinema for a month.
7 A new source of energy has been discovered
8 Has an announcement been made about the seveno'clock flight to London?
9 It is necessary for the project to be changed
10 Have you ever used this kind of computer
11 We have never been treated with such kindness
12 Has the letter been received from your parents yet?
13 The technology was borrowed from other fields by the medical profession
14 The boy, whose toy I broke, began to cry terribly
