—I'm not sure. She _________ be in the kitchen.
A:shall
B:may
C:need
D:must
计算﹣3x2(4x﹣3)等于( )
These beds are made of wood and are of high q____.
下图是明朝前期某一远航活动的路线图。这里所说的“远航活动”是指( )