With all the audience ________, the speech began. 

Most companies’ marketing effort is focused on getting customers, with little attention _______ to keeping them.

_______ China winning 51 gold medals, the 2008 Olympic Games came to an end.

— How about the suggestion Prof. Smith put forward at the meeting last Friday? — The committee discussed it for hours without a decision _______. 

The thief                  , they were happy to shout loudly.