5.
b)what kind of car did he buy?
c)what is she doing?
d)where we saw Bill?
e)Why has he left the party?
f)where are they going?
g)why doesn't he work?
6.
a)in
b)from
c)about
d)in
e)of
f)on
g)at
h)than
i)into
7
a)more difficult
b)worse
c)oldest
d)most expensive
e)youngest
f)better
g)best
h)fastest
i)bigger