用适当的介词填空,对的会采纳，谢谢！

1,Tom is [ at ]home, he' s not [ at ]school.
2,Look ,there are many apples[ on ]the thee and Mike is[ in ]the tree.
3,An old man is [under ]the tree.
4,It' s m ap of ] China.
5,I can see some cakes [ on ]the plate.
6,Our reading room is [ on ]the second floor.
7,We live in ] a new house.
8,There are some pictures[ on the wall.
9,My telephone is between ]the bed and the sofa.
10,I like playing chess [ with ]my father.
11,Please look[ at ] the blackboard and listen [ to ]the teacher.
12,It is three o' clock[ in ]the afternoon.
13,We would like[ to ]buy things [ for ]our grandparents.
14,Nancy is helping Mike[ with ]his Maths.
15,Come [ to ] the blackboard and draw a circle.
16,I have three boxes[ of ] chocolates.
17,Show your new telescope [ to ] me.
18,Lily's mother is teaching her with shapes.
19,The girl is [ in ]a red blouse.