1 . Sometimes people are ________ /ˌʌnˈkaɪnd/ to their pets.

2 . Some people are ________ to their puppies. They leave them in the street. (kind)

3 . Those who are _________ to animals should be criticized (批评). (kind)

4 . —It’s cruel of people to keep birds in the cage.
—I agree with you. They should be free and fly in the sky.

A．good

B．unkind

C．harmful

6 . Some people are ________ to animals and even treat them badly. (kind)

7 . Sometimes people are ________ to their pets. They leave their pets in the street. (kind)

8 . Don’t be so __________ to your brother, and you should love each other. (kind)

9 . ________ people don’t look after their pets and even hurt them. (kind)

10 . Which of the following words has a different prefix （前缀）to make it have an opposite （相反的）meaning?

A．happy

B．possible

C．kind

D．healthy