Would you like tea or coffee?--_____, thank you. I’ve just had some water.

We have been looking at houses, but haven’t found _____ we like yet.

I don’t think ___ possible to travel around the world without any modern equipment．

I’m moving to the countryside because the air there is much fresher than ________ in the city.

-----What do you think of the songs ?--As a matter of fact , _______of them sounds beautiful .