About one-third of North American garbage ________ from packaging.

Every year, each person in North America ________ about 1000 kilograms of garbage.

Someone ________ this garbage on the ground.

________ garbage do you throw away each year?

I often help my mother ________ the house at weekend.

--Hi, haven't seen you for ages! You look fine!

--________ You look well, too.

What do students in North America do ________ pollution?

They are making our classroom ________.

We would finish ________ in an hour.

Each ________ could clean up a bit of the school yard.