Montgomery County has won at least two berths in tomorrow's Maryland state basketball championship round as Poolesville coasted past Rising Sun, 71-55, yesterday and Sherwood scrambled to beat Wilde Lake, 79-72, at the University of Maryland's Cole Field House.

Poolesville will meet the winner of today's 3 p.m. semifinal between Crisfield and Beall for the Class C title tomorrow at 6 p.m. Sherwood will face the survivor of today's 6 p.m. Frederick-South Dorchester battle for the Class B crown tomorrow at 1 p.m.

In other games today, Surattsville plays Thomas Johnson of Frederick in a Class A semifinal and Churchburg tangles with AA foe Woodlawn of Baltimore County at 9.

Last night, Wootton played Lackey in a Class O semifinal and Churchhill took on Annapolis in AA action.

Mike Thut, an off-and-on starter all season, scored 10 points in a row midway through the fourth quarter as Sherwood, which led by 12 after the opening period, snapped Wilde lake's 14-game winning streak.

Thut, who finished with 22 points, also grabbed a game-high 17 rebounds, eight on offense in the second half.

Wilde Lake turned what looked like a Sherwood rout into a run-and-gun battle from the second period on. Dion Rose, the Wildcats' 5-foot-10 guard, scored 22 of his 31 points in the first half and helped rally the Howard County squad from 26-14 down to a 30-28 lead midway through the second quarter.

Poolesville, which upset defending state champion Brunswick by 18 points last Saturday en route to the finals had a much easier time disposing of Rising Sun. Roland Moore, the Indians high-leaping 6-3 forward, made his first three shots for a 6-0 Poolesville lead.

Neville, a 6-5 senior who led the scoring with 21 points, made seven of 10 shots - most from around the foul line - as Poolesville built its lead to 21-6.