I have two dogs.__ black one is 2 years old and __ yellow one is 3 years old.
Lily studies Chinese very _____and her Chinese is _____in her class.
Nobody teaches______ English. I learn it all by______.
—It is useful book. —Yes, it tells us how to play football.
Although he is only a _____ boy. He knows a lot.
To help the sick people in the hospital is _____ for me .