Question

3. Only when he apologizes for his rudeness      I speak to him again.

Answer 1

3. will句意：只有他为他的粗鲁行为道歉时，我才会再跟他讲话。"only+时间状语从句"放在句首时，主句要部分倒装。when引导的从句用一般现在时表将来，故主句应该用将来时。