Unit 3 Is this your pencil?
(时间：60分钟 满分：100分)
Ⅰ.单项选择(每小题1分，共15分)
1．—Is this ______ ID card?
—No.It's ______ book.
A．an；a B．the；a
C．an；the D．the；the
2．This is my pen，______ that is your pencil.
A．in B．of
C．and D．but
3．Two blue notebooks ______ in the lost and found box.
A．be B．is C．are D．am
