.Please be serious.I am not _______.You should consider it carefully

.Please be serious.I am not _______.You should consider it carefully
.Please be serious.I am not _______.You should consider it carefully

.Please be serious.I am not _______.You should consider it carefully
应该填sure

kidding
请严肃 我没和你开玩笑 你应该认真考虑

Please be serious. I am not kidding. You should consider it carefully.
意思是：
请认真点，我不是在开玩笑，你应该认真考虑一下。