There are several landladies approved by the universities who take in _____.

Urban (城市) crowdedness would be greatly relieved if only the_______ charged on public transport were more reasonable.

We could not reason out the way the robbers escaped，because we were unable to find any ________ of them.

On yesterday interview, he didn’t make a(n)_________at all; what’s the matter with him?

The _____ of the trees in the water was very clear.