The boy is ( ) school 括号内填个介词

Where is your brother,Bill.I t he is in the schoo library.填空 no student and teacher is in the schoo. 这句话为什么用is .谢谢! the boy is singing what is the boy where is the boy the boy is h0w is the boy. The boy is( )school? The boy is ( )the window? the boy is happy还是the boy is happily Is the boy()red yuo? The boy is c___the house The boy's______ is tom The boy is always___(fun). the boy is mine中文歌词 The boy is enjoying___meal now. The boy is in---------room The boy is very_____(excite)