When we use 'many' for countable nouns?

[Lordy]

English Grammar Tests, Elementary Level

ESL/EFL Test #52 "Much, many, a lot, lots", question 6

How ......... water do you drink every day?

(a) many
(b) much
(c) lots of
(d) very

English Grammar Tests, Elementary Level

ESL/EFL Test #52 "Much, many, a lot, lots", answer 6

How much water do you drink every day?

Correct answer: (b) much
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when we use many?

Lordy

[Mister Micawber]

.
Use 'many' for countable nouns: 'How many bottles of water do you drink every day?'
.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber