An easy way to get the audio in sync - drop your imported clips into the timeline, and play both your static camera (with audio) and close up (with audio). As you begin to line up the two video tracks on top of eachother, you'll be able to tell when your audio is perfectly in sync - you won't get that "echo" effect any longer. Once the two videos are perfectly aligned, simply get rid of one audio track.

Some people like to keep their close up video recording constantly along with the static video, as it can make lining up all of your audio easier when you get into editing. Either way, you can align your clips by playing both audios at the same time. Also, the Waveform audio view in Premiere can help you line up your tracks, by making it easier to match loud and quiet portions of your video.

Good luck!