The girl was so absorbed _______her studies that she didn’t notice her friend walking towards her.
---Why did you put the wood near the fire? It’s dangerous. ---Don’t worry. Wet wood won’t _______.
— Why didn’t you come to Mike’s birthday party yesterday? — Well, I ____, but I forgot it.
_______ different life today is ________ what it was 30 years ago.
The time he has devoted in the past years _______ the disable is now considered ________ of great value.
Mike, as far as I know, _______ like to play music.