I make gravy when I roast a turkey. vs I make lights when I roast a turkey.

[Duniya]

English Grammar Tests, Elementary Level

ESL/EFL Test #245 "Non-Count and Count Nouns (4)", question 3

I usually make ......... when I roast a turkey. This is a non-count noun.

(a) lights
(b) plates
(c) cups
(d) gravy

English Grammar Tests, Elementary Level

ESL/EFL Test #245 "Non-Count and Count Nouns (4)", answer 3

I usually make gravy when I roast a turkey. This is a non-count noun.

Correct answer: (d) gravy

Your answer was: incorrect
I usually make lights when I roast a turkey. This is a non-count noun.
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why is it "gravy" ? I don't understand. could you explain to me please?
thanx
Duniya

[Linda]

Gravy is a sauce that is made from turkey, chicken, beef etc. juices (fat), flour and spices. Gravy is the only non-count noun in this question.
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