B2
1.in
2.in
3.on
4.in
5.in
6.on
7.on
8.in
B4
1.big
2.floors
3.has
4.class
5.Where
6.on
B5
1.How are you?
2.How about you?
3.Which class are you in?
4.Where is your classroom?
5.How many students are there in your class?
6.What time do you get up?
7.What time do you have breakfast?
8.What time do you go to school?