It’s really a(n)         that Tony, a child of only two, can play the piano so well.

---- What made her so upset ? ---- ________ . 

After long and hard work, the police at last discovered the         of the baby found by the side of a road.

It is a common ____ to have a cake with candles to celebrate a holiday ，birthday or any other occasion.

Tom has a (n)      for language，while his sister is a born pianist