TSX drops on Greek concerns, copper prices

By John Tilak TORONTO (Reuters) - Canada's main stock index fell sharply on Tuesday, with the market continuing to feel uncertainty fueled by the victory of a left-wing party in Sunday's Greek election and with weaker copper prices pulling mining shares lower. Copper prices neared their lowest levels in 5-1/2 years on concerns about China's economic growth. Teck Resources Ltd dropped 3.3 percent to C$15.34. The benchmark TSX index's fall followed gains in each of the four pre