There must be _____ book which could help . 

Is there _______ wrong with you today?

Tourists have been recently gained access___ Angkor Wat by air and _____ has hotels nearby.

—Now that you like computers very much, isn’t it a good idea to get ______? —Well, I’d like to but I can’t afford that expensive a computer at present.

I had no idea ____ is better, so I took ____ of them.