He is an orphan, so he is not sure which family name he should have.
他是个孤儿,因而不知道他自己姓什么。
Yes, but I'd rather not have done it.
是的,但我宁可没有这样做。
He passed his exams, and even better, when he left university he had earned enough money to start his own business, offering guide services to tourists.