—Without friendship, one can’t be happy although he is rich enough. As for me, I will never forget the happiest days _____________ I studied in the university.
—That’s a good idea.
A. that B. when C. which
—Without friendship, one can’t be happy although he is rich enough. As for me, I will never forget the happiest days _____________ I studied in the university.
—That’s a good idea.
A. that B. when C. which