Make any necessary changes to the words to fit in the blank spaces that follow them.
Pleas explain grammar tips in brief.
29- Used, useful, usefully, usefulness
a) Kris bought a usefulness Land Rover to drive around the country.
b) I found a useful book in the attic about repairing electrical appliance.
c) The blank paper wasted in wrapping boxes can more usefully be a notebook.
d) Managing board doubts the used of importing raw materials.
30- Fail, fail, failure
a) Ed passed three exams, and fails only one.
b) His had never had a fail before.
c) His failure was so shocking to him that it took three months for him to recover.
31- Vary, various, variety, variation
a) Boiling point of a liquid may vary due to variation in air pressure.
b) For variety reasons, I doubt whether they are telling us the whole truth.
c) I don't like my job, because it lacks various.
32- Pity, pity, pitiable.
a) It is a pity that a well-educated person behaves so cheaply.
b) The young children who lost all their family members in war are to be pitiable.
c) A young reporter videotaped pity scenes of a dying soldier.