( ) （6） We have two dogs. One is white, ___________ is black.
A. other B. others C. the other
__________lovely they are!
A. what B. What a C. How
The mother pig has three _________.
A. piglets B. puppies C. kittens
What are ___________over there?
A. that B. these C. those
The ducks and ducklings _______swim.
A. doing B. are C. can
How do you do？ --______________________?
A.How do you do? B. Thank you. C. I’m fine, thanks.