Asia has achieved more in controlling the bird flu than Europe in the past few years, _______ the number of people infected with the virus is going up sharply.
The most important thing ______ we should pay attention to is the first thing ______ I have said.
This is the only one of these books that ______worth reading.
The man ______ talked to you just now is my father.
They thought too much about ______.
Did you find the notebook ______ Jim had given me for my birthday?