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
Easy as the problem is _______, I’m still worried about _______ another breakdown.
I don’t know how he made his money _______. I only know now he is really rich.
In some countries, many students participate in various programs, _______ they learn about the sense of responsibility by volunteering their services.
The hotel was terrible, and not at all what we _______ to expect in the advertisement.
Mom told him he was forbidden to watch TV for a month. _______, he stormed out of the room.