题目

Welcome to the Window of the WorldOpeningFees(费用)Monday to Friday10:00 a.m.-6:00 p.m.Adult(成年人)﹩1212-18﹩8Saturday to Sunday8:00 a.m.-8:00 p.m.6-12﹩6under 6free 【1】On Mondays, the Windows of the World opens at ________.A.6:00 in the afternoon B.8:00 in the morning C.10:00 in the morning【2】Helen is 15, and her little sister is 6. If they go to the Window of the World, how much should they pay?A.﹩14 B.﹩18 C.﹩20已知a、b、c是△ABC的三边，且满足，且a+b+c=12，请你探索△ABC的形状．