Art is on Friday. Is art on Friday?
Music is on Thursday. on Thursday?
P.E. is on Monday. on Monday?
Music is on Wednesday. on Wednesday? 
Tom is at school. Is he at school?
Bill is at school. at school?
Linda is at school. at school?
Catherine is at school. at school?
Mark and James are at home. Are they at home?
Ann, Linda and Helen are in the forest. in the forest?
The girls are in the forest. in the forest? 
Ann is in the forest. in the forest?