Exercise  31		Which word doesn't belong to the group
1.	book	living room	pencil	schoolbag
2.	people	man	pen	child
3.	bike	notebook	ball	children
4.	red	under	over	in
5.	teacher	school	student	bathroom
6.	pencil case	yellow	person	green
7.	eat	play	drink	cook
8.	mobile	tall	short	big