Is your brother’s name Tom? --- Yes , ____ is.
Although he is very old, ______ he works very hard.
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