The english is incorrect as it could be inferred to mean that he would have to be drunk already to drink the alcohol. A more accurate translation would be If he were to drink alcohol he would become drunk, or he would get drunk.
If he drank is equivalent to if he were to drink.
If he drank alcohol, he would get drunk
I agree that this should also be accepted
It is but with this awkward response: "You have a typo.
If hed drunk alcohol, he would get drunk".
And the apostrophe is missing so this is misleading. 20201110