The air in Beijing is getting much ______ now than a few years ago.
—____ do you exercise? —Four times a week
—How was the weather yesterday? —It was terrible. It rained ____. People could ____go out .
Twenty-five percent of the water in this river _____ dirty in the past. A. is B are C. was D. were
Eating a lot of vegetables __________ good for our ________..
I don’t feel like _____ apples but I would like _______ some bananas. A. eating; having B.to eat; to have C eating; to have D to eat; having