一个方体的横截面是边长为2.5厘米的正方形，这个长方体的长是14厘米它的表面积是____

—The scarves are all beautiful.I can't decide which one to choose.—Oh,look at this red one.I think it's______.

Students in our school are encouraged to ________more activities after class in order to broaden their knowledge． （   ）