The top leaders of the two countries are holding talks in a friendly _________. 

What is the ______ to Beijing and back?

The head office of the bank is in Beijing, but it has _____ all over the country. 

The policeman scolded the driver for turning without a           ．

. It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.