We must keep on learning if we want to keep up with the     of the changing times.

What a wonderful ___________ and color! I’ll take the dress.  

Professor Li, do you like Ewa and can you make a(n)_______ on her new movie?

Scientists have found no ________of life on Mars so far,though great efforts have made on the research.

What’s the _________ of having a public open space where you can’t eat, drink or even simply hang out for a while?