Things went well for him during his early life but in middle age his （） seemed to change.

单项选择题She refused to tell us the（）of the news although we insisted that she should.

A. source
B. beginning
C. birth
D. origin

单项选择题Britain might still be part of France if it weren't （）a disastrous flood 200000 years ago, according to scientists from Imperial College in London.

A. upon
B. with
C. in
D. for