He had been________absorbed in watching the car passing by that he didn’t notice his friends coming[ ]

he can pass the entrance examination is quite uncertain

When will you go back to your hometown – _______.

I’m ______the suggestion. How about you—Hard to say. I’ll have to think it over.

Fear is something that you are born with. You can’t ____ yourself of it completely but you can ____ certain fears under certain conditions. [ ]