The verb '' to be''

Fill in the gap with the right option. Bill's cats ... black.

Fill in the gaps with the right option. We ... at school.

Fill in the gap with the right option. You ... a pupil.

Fill in the gap with the right option. The houses ... old.

Fill in the gap with the right option. Tom ... in bed.

Fill in the gap with the right option. Their dogs ... big.

Fill in the gap with the right option. My friends and I ... in the park.

Fill in the gap with the right option. This girl ... my sister.

Fill in the gap with the right option. The duck ... yellow.

Fill in the gap with the right option. My mother ... at home.