A:I don't know whether to find a job after graduation or to continue my study abroad.
B:You have been thinking about it for three months. Don't drag on and on about it and it's time for you to make a decision.
exp. To continue for an excessively long time.（拖延）
e.g. This case has dragged on for months. When will it finally end?
e.g. How much longer is this going to drag on?
e.g. Let's not drag on this discussion, we've got to reach a decision.
e.g. You must act quickly on these matters and not let things drag on.
e.g. He sat down to think about how he had gone wrong.
e.g. Don't think about that job, Mary has it sewed up.
e.g. Tell me truly what you think about it.
2.make a decision：做出决定
e.g. It's hard to make a decision without knowing all the facts.
e.g. We must look ahead before we make a decision.
e.g. The parents are away; no one in the family can make a decision.
3.on and on：继续不停地
e.g. She chattered on and on about her recent trip.
e.g. I know how you feel，but there’s no need to go on and on about it．
e.g. It was a very long concert. The music went on and on.