选择题：1.you( )be excited that you're going back to your hometo

选择题：1.you( )be excited that you're going back to your hometown soon.
----yes , i can't wait any longer a,shall b,can c,need d,must 2.（ ）i swim here? -----i'm sorry. children ( )swim alone here. a,must,can't b,may,must c,can,must't d,can't, can 请注明一下原因,谢谢