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
Unfortunately, when I arrived she ________, so we had only time for a few words.
_______ two exams to worry about, I have to work really hard this weekend.
The tickets are________ for 5 days only.
I had just stepped out of the bathroom and was busily drying myself with a towel ______ I heard the steps.
Teachers words and deeds always _______ a great effect _____their students.