You should be ________ a diet; otherwise you will get fatter and fatter

I don’t know _______ for the party.— You look so good now. I think the pink T-shirt_______ the grey jeans very well.

It isn’t so much whether he works hard; the question is whether he works _____

Tom likes looking out ________ the playground __________ the classroom.

The guest does not the argument but watches a volleyball match on TV.