问几个英语题.可以说明选择原因吗?

问几个英语题.可以说明选择原因吗?
It's a ball pen,_____?It is a pencil.
A.what is this B.and what is this C.this is what D.what's it
Tow _____are in the room.
A.mans B.desk C.sheeps D.sheep
You can_______ me at 685-6034.--OK
A.phone B.spell C.talk D.say
This is____“I”
A.a B.an C.the D./
No.1____in Beijing___ his school.
A.Middle School B.middle school 这道题格式怎么写?
音素是不是就是音标的第一个音?解释一下.
Thank you!
第一题选A,还是选B，两个好像都挺有道理的