在+（-3），-|-2|，-（-4），0.5，0，-2²，（-3）²中，是负数的是______．

- Have you considered _____ your job as a teacher?

　 - Yes. I like the job because a teacher is often considered _____ a gardener.

A．to change; to be

B．to change; being

C．changing; being

D．changing; to be