The visiting minister expressed his satisfaction with the talks, ________ that he had enjoyed his stay here.

_______ he goes, she will go, and she never cares _______ happens.

In Europe _______ are the two leading contenders for a global reservations system.

By the middle of the 21st century, the vast majority of the world ’s population will be living in cities _______ in the country.

As to the various pollutions,which of the following is NOT true?