补全下面的对话。
A.Size 8,please.
B.These shoes are nice.
C.I will take them.
D.How much are they?
E.Here you are.
A:Can I help you?
B:Yes.____Can I try them on?
A:Of course.
B:____
A:OK.____
A:$50.
B:Here is the money.____
如图,已知∠A=33°,∠B=75°,点C在直线AD上,则∠BCD为( )
为了促进儿童骨骼的发育,除了要多补充含钙的食物,还应补充( )