WEST PITTSTON — The Lake-Lehman Black Knights are quite aware of their ongoing league unbeaten streak. They also know how it was built. By viewing every opponent as a dangerous threat, the Black Knights motivated themselves into a Wyoming Valley Conference power through all of last season and the first part of this one. They weren’t about to let it end with a tricky trap game. So senior Lynea Gregory scored two goals and assisted on another Wednesday as Lehman fended off upstart Wyoming Area 5-2 to win one battle of unbeatens and set up another. “As a senior, I’m just trying to step up,” Gregory said.