A. B. C. D.
E. F. G.
—Yes. It's ____ pencil.
—____ a rubber.
—It's a pencil case.
A.那是你的橡皮吗？
B.这不是我的铅笔。
C.不，它不是。
D.那是我的钢笔。
E.是的，它是。
I
II
Is that a ruler?
This new pencil is for you.
What's this?
Is this your schoolbag?
That isn't my pen.
A. Oh, what about this one?
B. No, my schoolbag is red.
C. Yes, it is.
D. Thank you.
E. It's a ruler.
This book is for you.
Is this your pen?
Where's your rubber?
Don't eat in the library.
Sit down.
A. Yes, it is.
B. It's over there.
C. Yes, Mr Green.
D. I'm sorry.
E. Thank you.
A. Thank you.
B. Hello, Mike.
C. No, it isn't. It's my rubber.
D. Hello, Amy. Is this my rubber?
E. Look! It's on the book. Here you are.
F. Where's my rubber?
A.It's a bag.
B.Miss Li, is this your bag?
C.Look, what's that on the desk?
D.No, it isn't. Maybe（或许）it's Miss Li's.
E.Is that your bag?
F.Yes, it is. Thank you.
B.
C.
D. 
F.
G.
.
? —Yes, it is.
? —Yes, it is.
. —It's nice.