He is very humorous, while his brother is rather serious. That is ___their difference lies.
| A．why | B．where | C．how | D．when |
I can never forget the day _______ we worked together and the day ______ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
You're the only person ______I've ever met ______could do it.
| A．who;/ | B．/; whom | C．whom;/ | D．/; who |
He isn't such a man ______he used to be.
| A．who | B．whom | C．that | D．as |
It there anyone in your class ______family is in the country?
| A．who | B．who's | C．which | D．whose |
Do you know the man _______?
| A．whom I spoke | B．to who spoke | C．I spoke to | D．that I spoke |