一、选择填空（15分）
( ) 1. You can’t catch up with others __________ you work hard.
A. until B. after C. unless D. when
( ) 2. _______ the Forbidden City is almost 600 years old, _______ it is still very beautiful.
A. Although; but B. /; although C. Although; / D. Because; so
( ) 3. It is _____ to cycle around Guilin.
A. a great fun B. a fun C. great fun D. a great funny
