America is a(n) ___ country.You can hear___everywhere.

He went to bed ____, and when he woke up he found he still had his shoes on.

 -Now that you like the personal computer very much, isn't it a good idea to get one?-Well, I'd like to but I can't afford _____ computer at present.

Water can absorb and give off a lot of heat without big changes in temperature,thus creating a___environment.

There is an old proverb, “Love me, love my dog. ” But there is ________ wisdom in this: “Love me, love my book.”