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..........
D- Disintegration because, “to minimize deterioration” is to minimize something from decaying or in the act of becoming worse or disintegrating
When doing a multimedia presentation, the thing that one might be prepared about in advance in case the equipment failure during presentation is to keep giving the speech and using the chalkboard to provide the visuals. This will keep the people interested in listening without caring about the failed instrument.
That is true, If you speak kindly and follow up with kind words, then you will sound more caring if you said it in a rude way.
Hope this helps! Have a great day. :)
-wfz
