12.So absorbed__________in her work that she didn't realize I was behind her.
You said boys were cleverer than girls. That is _____ I disagree.
______ is a good form of exercise for both the old and the young.
In China ________graduates go abroad to have a further study every day.
If you like, you can take ____.
It was raining heavily, Little Mary felt cold, so she stood _____ to her mother.