When I opened the door, I found my father sitting in his chair, completely _______ in the humorous stories he was reading.

_______ in thought, he almost ran into the car in front of him. 

To celebrate the New Year, the students stayed in the classroom after school, _____ the performances and ______ the room.

The houses for the low-income families_______ at present in our city will be completed next year。

Many of the one-family children are so accustomed to ______ that they react violently when they hear something different.