________is the largest freshwater lake in China.
We decided ______at home _____ the bad weather..
—____ 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 ________..