下列珍稀动物及所属类群，不正确的一组是（　　）

A．鲸鱼--哺乳类

B．蝙蝠--鸟类

C．企鹅--鸟类

D．娃娃鱼--两栖类

—Thank god, you finally returned home ________.

—You can never imagine how I worried about you when I was told about the terrible accident.

A．safely

B．safe

C．separately

D．cleverly