Interested in Language
I encounterd this question and answer.
The man decided to wait at the station until his wife ( ).
3. has come
4. will come
The textbook says that the answer is #1 "came."
I understand the sentence "The man decided to wait at the station until his wife came" is correct, if the whole event described here is in the past. That said, I think #3 "has come" can be another possible answer as well, if his wife hasn't shown up yet and he is still waiting for her. Is my understanding wrong?
In your situation, #3 is possible, though I'd be more likely to say 'The man has decided to wait until his wife comes'.