A、错
B、对
A、对
B、错
A、对
B、错
A、biannual
B、annual
C、quadrennial
D、nual
A、错
B、对
A、错
B、对
A、the Expo 1993
B、vthe Expo 2010
C、the Expo 2001
D、the Expo 2000
A、biannual
B、biennial
C、annual
D、quadrennial