________ which university to attend，the girl asked her teacher for advice. (2013·四川，8)
| A．Not knowing | B．Knowing not |
| C．Not known | D．Known not |
Finally, the thief handed over everything ____ he had stolen to the police.
| A．that | B．which | C．whatever | D．all |
The foreign guests, ____ were government officials, were warmly welcomed at the airport.
| A．most of them | B．most of that | C．most of whom | D．most of those |
This is the very letter ____came last night.
| A．who | B．which | C．that | D．as |
I know only a little about this matter; you may ask ____ knows better than I.
| A．whoever | B．whomever | C．anyone | D．the one |
This is the school ____ we visited three days ago.
| A．where | B．/ | C．when | D．what |