-----______ there any living things on other planets ?
-----I have no ideas. Maybe we can know more about that in the future.
A：Is
B：Are
C：Has
D：Have
20和16的等比中项是（ ）
“一国两制”是完成祖国统一大业的基本方针。邓小平提出的“一国两制”中的“两制”是指( )
