The government _____ air quality in urban areas from level one to five: excellent, fairly good,slightly polluted, poor and dangerous.A arranges B. classifies C. distributes D. divides
With his eyes _______ on me, he came towards me.
Humans are destroying nature day by day, _____of course, will cause punishment sooner or later.
The little girl was jumping __________ in the kindergarten, waiting for her mother.
. We left in __________ that we forgot to lock the door.
______ I made a speech in front of so many people, I felt quite nervous.