有关于初一英语与科学的问题

孩子~错了别怪我~
(1) Look at this picture .It's a picture of my __boy's_____bedroom.
He has a bird .__Its____name is polly. He looks after it every day .But it's not in the picture .You __can't__see it there .Can you __see___a cat? It's __under_____the chair. The cat and the bird are in different ___rooms___. They can't live in the ___same___room. His books are on the desk. His pens and pencils are in his ___bag___. The bag is ___behind/beside____the door His bed is beside the desk. In the morning ,he puts everything in _____good_____order.

(2)A:Excuse me ,Li Ming.__Whose___biack dog is this?
B:Let me see. It's not __mine___.I think it's Li Lei's. My dog is __blue(这个可能不太对~蓝色的狗~~~有点吓人）___.
A:Li Lei,look at the dog __beside/by（应该不是behind，否则那人看不见）___the tree. Is it yours?
C:No,it isn't mine. My dog is black and __white___. I think it looks live(打错了吧~应该是like吧？） Wang Fei's.
A:Who's Wang Fei?
C:He's my friend. Look! He's over there. Let's go and see __him__.
A:OK.Let's go.
C:Hi，Wang Fei! Is __that__your dog?
D：Oh，__yes/yeah__. It's mine.
C：It's a __lovely__dog! Don't __leave___it!

（1）液体的密度是多少？
(12.8-10.7)/(7.9-5.8)=1
(21.6-12.8)/(16.7-7.9)=1
(40.0-21.6)/(35.1-16.7)=1
取平均数为1
所以 密度为1g/cm³

（2）容器的质量为多少？
10.7-5.8*1=4.9g
所以 容器的质量为4.9g