d.o

i need to do my homework before dinner.

she always does the dishes after meals.

he does a good job at work.

we do business with many countries.

you should do exercise every morning.

they do their best to finish the project.

smoking can do harm to your health.

the scientist does research on climate change.

i usually do laundry on weekends.

my mother does the housework every day.

does she do any volunteer work?

we don't do that kind of thing here.