Nobody would stand out admitting the fact, for some reason,      they lost the game.

So absorbed _____ in her work that she didn’t realize I was behind her.

.What some teenagers don’t realize is ____ difficult life can be if they get addicted to drugs. 

— Although she sometimes loses her temper, her students like her no less. — That’s it. _____ , she is really a good teacher.

I could ____ he was surprised from the expression on his face．