:Unit 3 Is this your pencil?
Written test part （共80分）
Ⅳ. 单项选择(每小题1分， 共10分)
从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
( ) 16. This is ______ eraser and it is blue.
A. a B. an C. the D. 不填
( ) 17. —Is this your pencil?
—Yes, it is. Its ______.
A. I B. me C. my D. mine
( ) 18. —Please call me ______ 684-3759.
—OK.
A. at B. of C. in D. for
( ) 19. This set of keys ______ in ______ bag.
A. is; he B. is; his C. are; his D. are; he
( ) 20. Thanks for ______ me with my work.
A. help B. ask C. helping D. asking
( ) 21. —Look! Those ______ my ______.
—Oh, I see.
A. is; box B. is; boxes C. are; box D. are; boxes
( ) 22. That is my ______, and we have classes in it.
A. classroom B. family C. map
