英语题和数学题 急~~~~ 求高手解答

1. (x-y+z)(-x-y-z)=y^2-(x+z)^2=y^2-x^2-z^2+2xz
2. (6分之1y²)-(3分之1y)-(2分之1)=(1/6)(y^2-2y-3)=(1/6)(y-3)(y+1)
3. 9-x²-2xy-y²=9-(x+y)^2=(3+x+y)(3-x-y)
4. Can you buy a book _____ Garfied? D
A.calls B.calling C.call D.called
5. --Where is John Amy? --She has _____ , so she didn't come to school today. C
A.fewer B.fevers C.a fever D.much fever
6. --____ will this family return? --In a week. D
A.What time B.When C.How long D.How soon
7. I passed the exam ___finally__.(final)
8. What's the __difference___ between these two words?(different)
9. I will try my __best___ to finish the work.(good)
10.She fell __asleep___ before I entered the room.(sleep)
11.Tom ___has gone__ (go) to Beijing.He __will be___ (be) back in three days.
12.Please ___help___ me with my English.(help)
13.Suddenly Mary saw a robber ___running__ out of the bank.(run)
14.What should you do _to raise____ money for the SPCA?(raise)
15.She always ___helps__( help,helps) others.
16.It's time to ___have supper__(supper,have supper).

楼主的问题高深莫测，贫僧无能为力丫！！！