It's a bird.( ) name is Polly.
A. Its
B. It's
C. His
D. It
( ) skirt is yours?
A. Whose
B. Where
C. How
D. Which
There isn't ( ) water in the bottle.
A. any
B. some
C. no
D. a
Is ( ) necessary to complete the design before the National Day?
A. that
B. this
C. it
D. he