It was 1920 ______ regular radio broadcasts began.
16.He’ll never forget the years _______ he studied with his cousin in Oxford University.
15.The book Been There, Done That written by a Chinese American graduate is _____a real story.
14.The number of the people who joined in the journey down the Mekong River____four.
13.Whenever we are in ____ trouble, we should never lose______heart.
12.On Oct. 23 , 2008 there was the 6oth sports meet, _____our students took an active part in.