Please don't ________ too much on the painful memories. Everything will be all right.
句意：请不要过多地停留在痛苦的回忆上。一切都会好起来的。dwell居住，存在于；集中于。hesitate犹豫。linger逗留，闲荡，拖延，游移。retain留住；保住。故选D。