One and ones

This bag is very old. I need a new ___________.

• one

• ones

Small pineapples are sweeter than big ___________.

• one

• ones

The new smartphones are much faster than the old ____________.

• one

• ones

Which is your car, the black _________ or the white ________ ?

• one, ones

• one, one

She needs new shoes, the old _________ are too small.

• one

• ones

These dresses are expensive. Are there any cheap _______?

• ones

• one

I would like to have a cupcake – the red __________ looks great.

• one

• ones

I would like to have some cupcakes – the green __________ look delicious.

• one

• ones