-- Excuse me. where are we going to have our class meeting?
-- I’m not sure. Ask our monitor, please. He know.
A:can
B:may
C:need
D:shall
如图是某街道边的垃圾分类箱示意图,矿泉水瓶应放入( )
青少年正是长身体的时期,饮食既要均衡、适量,又要注意卫生、安全,下列说法正确的是( )