Twenty-five percent of the water in this river _____ dirty in the past.A. is B are C. was D. were
What at nine o’clock last Sunday morning? A. was you doingB. were you doingC. are they doing
If there are trees, the air in our city will be cleaner. A. fewer, much B. more, more C. more, much
My sister can’t cook, I can’t, . A. too B. also C. either
I hear she’ll be back a week. A. after B. fromC. in
Money isn’t_____.