根据句子意思及所给的词首字母或汉语提示，完成下列单词。
—What’s the shape of the ball?
—It’s a c___________.
There are sixty seconds (秒钟) in a m____________.
The food is d___________. I want to eat more.
There are about two ___________(千) students in this school.
The bottle is __________(满的) of water.