* TSX rises 60.12 points, or 0.49 percent, to 12,210.78 * Eight of 10 main sectors advance. * Nexen up 14 percent, Progress gains 13 percent * MEG, Canadian Oil Sands, Athabasca decline By John Tilak TORONTO, Dec 10 (Reuters) - Toronto's main stock index hit a one-week high on Monday, led by a rally in Nexen Inc and Progress Energy Resources Corp, after Canada approved foreign bids for both energy companies while also imposing limits on takeovers in the sector. Nexen sh