_______ it’s very foggy, the highway is closed for the time being.
The sign "No Smoking" in the subway means passengers ____________ smoke.
can
should
mustn't
needn't
We usually know about the history of a city in the ____________.
museum
factory
bank
hospital
A smile costs nothing, but it gives so ____________.
little
few
many
much
My friend advises me ____________ comedies to relax myself.
watch
to watch
watching
watched
This piece of music ____________ very beautiful. It's my favorite.
smells
looks
sounds
tastes