One or ones

My backpack is too oldfashioned. I want the new ...

I like animals very much. So, I've got three cats. Two grey ... and a black ...

-Where's my favourite dress, mum?

- The red ... or the blue ...?

Which magazines are yours? The ... on the desk or the ... on the shelf.

- I'd like to buy this CD player.

- The cheaper ... ?

Big oranges are tastier than small ...

- Two months ago Mark painted his bedroom.

- Is it a green ...?

Which games do you prefer? The board ... or the sports ...?

What kind of job does she need? A full-time ... or a part-time ...?

The new car is OK, but I prefer my old ... .

I've read so many stories, but I like the funny ... .

He has to answer letters from Helen and the ... from Bill.