A lot is used for everything, for example:

Positive countable- I have a lot of apples.
Negative countable- I don't have a lot of apples.
Positive uncountable- There is a lot of snow in the mountains.
Negative uncountable- There isn't a lot of snow in the mountains.
Questions countable- Are there a lot of apples in the tree?
Questions uncountable- Is there a lot of snow in the mountains?

Much is used for uncountable things: Snow, water, love, air. However, there are exceptions: Money, time.
Uncountable things are grammatically used like singular: How much snow is there?

Many is used for countable things: Apples, balls, etc.
Countable things are grammatically used like plural: How many apples are there?

Much and many are used only for questions and negatives:

How much money do you have?
I don't have much money.
How many apples do you have?
I don't have many apples.

* Don't confuse much with too much, which means demasiado.

A little is used with uncountable things: There is a little water left in the bottle.

A few is used for countable things: There area few apples in the tree.

* There is a difference between a little and little.
A little is used in the positive sense, and little is used in the negative sense:

Oh no!! I have little money left. Oh cool!! I have a little money left.

Any is used for questions, and negatives:

Question: Do you have any bread?
Negative: I don't have any bread.

* The same rules apply so something & anything, somebody & anybody, and somewhere & anywhere as some & any

All is used with uncountable words: All of the snow has melted.

Every is used with countable words: Every apple in the tree is ripe.

* Everybody, and everything are used as countable words also.

1) How ____ air ___ there on the moon?

2) Don't eat too much, there ____ ____ oranges left.

3) Keep bringing me things, there is ________ space left.

4) How _____ room ____ there left in your black bag?

5) Hello? Is there ________ there?

6) We're all alone, there isn't ________ here but us.

7) Come out of your hiding place. I know there's _____ there.

8) Did you meet ______ interesting at the party?

9) Let's go _______ new for dinner this evening.

10) There are ________ dirty dishes in the sink.

11) OK, but I don't want to go _______ that's too expensive.

12) Have you seen my blue hat, I have looked ________ for it, but I can't find it _______.

13) Ouch! There's _______ in my eye!

14) Lets go skiing! There's ______ of white snow in the mountains.

15) I don't like this party, there's ______________ I know.

16) I don't like this party, I don't know ______________.

17) There's not ___________ pizza left, let's buy more.

18) How ____________ stars can you see in the sky?

19) There are not ___________ cherries left, eat them quick.

20) Don't worry about gas, we have ______ of that.

21) ______ dog in the pound is well fed.

22) ________ the gas in the car leaked out.

23) _______________ in the world needs air to breath.

24) We need all the people to help. Do you think ______________ will help?