完形填空。
I ①agoodfriendinmy②.Itis abird.③nameisPolly.④threeyearsold.Itisyellowand
very ⑤.Iplay⑥it⑦school.Myclassmates—dKateoften⑧andseeit.Pollycan⑨everyday.I⑩ittosing'ABC'.Nowitcansing'ABC'.Ilikeitverymuch.
（ ）①A. have
（ ）②A. home
（ ）③A. It's
（ ）④A. Its
（ ）⑤A. beautifully
（ ）⑥A. and
（ ）⑦A. before
（ ）⑧A. come
（ ）⑨A. sang
（ ）⑩A. teaches
B. had
B. basket
B. Its
B. She's
B. beautiful
B. to
B. after
B. go
B. is singing
B. teachers
C. has
C. box
C. His
C. He's
C. tall
C. with
C. behind
C. came
C. to sing
C. taught
D. am
D. schoolbag
D. Her
D. It's
D. short
D. for
D. in front of
D. comes
D. sing
D. teach