一、单项选择(15)
( ) 1. He has been away .
A. since a month B. for a month C. for a month ago D. in a month
( ) 2.— have you lived here? —Since 1995.
A. How far B. How long C. How often D. How soon
( ) 3.He has never been to European country .
A. a before B. an before
C. a ago D. an ago
( ) 4.There _____________great changes in China in the past thirty years.
A. are B. have C. were D. ha ve been