_______ he lives in a rich family, he started from the lowest position as an ordinary worker to make his living.
| A．While | B．Unless | C．As | D．Since |
Do you know the reason_____she didn’t attend her boyfriend’s birthday party yesterday?
| A．why | B．which | C．for that | D．for why |
What especially impressed us was the way_____the girl studied foreign languages.
| A．不填 | B．which | C．by which | D．how |
The young boy got himself into a dangerous situation_____he might lose control over his sports car.
| A．that | B．which | C．when | D．where |
What if we meet with a situation_____none of us are able to deal with?
| A．where | B．in which | C．what | D．that |
_____has happened many times, children may get drowned in this river.
| A．As | B．Which | C．What | D．That |