The new method is indeed advanced and effective, quite different from _____ already in use.
| A．it | B．what | C．that | D．which |
---Do you know ________?
--- I'm not sure. Maybe he is a businessman.
| A． who he is | B．who is he | C．what he does | D．what does he do |
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 |