1: d) have did
2: b) had done
3: c) had cleaned-called
4. b) had told
5: a) told-had left
6: a) had finished
7: b) heard
8: c) had written
9: b) had gone
That is the best book that I ( have read )on that subject.
reason = because that event has already happend in past but its impact is still on present so it is past perfect..........
Answer:
Assuming you have scrolling set normally, pressing page up would maoe the page... well.. go up