. He made clear to his workmates that he would leave the company.
| A．it | B．that | C．them | D．this |
He is a friend ______ can help you in time of need.
| A．who he | B．whose | C．/ | D．who |
The most important thing ______ we should pay attention to is the first thing ______ I have said.
| A．which, that | B．that, which | C．which, which | D．that, that |
This is the only one of these books that ______worth reading.
| A．has | B．have | C．is | D．are |
The man ______ talked to you just now is my father.
| A．who | B．he | C．which | D．whose |
They thought too much about ______.
| A．which I had said | B．what I had said |
| C．that I had said | D．I had said |