Question

How much flour is/are there?
How many bananas is/are there?
How much cheese is/are there?
How many watermelons is/are there ?
How much butter is/are there?
How many mangoes is/are there?

Answer 1

1.are
2.is
3.are
4.is
5.are

Answer 2

is
are
is
are
is
are
flour-мука является неисчислимым, поэтому не может быть are