a) there are a lot of/many apples left.
b) there isn't many/much rain in this part of Russia.
c) how many/much money do you need.
d) i'm sitting in a/an armchair.
e) i haven't got a/an computer in my bedroom.
f) Was/were the exam difficult? Yes is was/were.
g) football is more cheap/cheaper game to play than golf.
h) london is biger/bigger than Cardiff.

a) there are many apples left.b) there isn't much rain in this part of Russia.c) how much money do you need.d) i'm sitting in an armchair.e) i haven't got a computer in my bedroom.f) Was the exam difficult? Yes is was.g) football is more cheaper game to play than golf.h) london is bigger than Cardiff.

a) a  lot  of / many ( на самом деле оба слова в данном случае подходят)b) muchc) muchd) ane) af) wasg) cheaperh) bigger