The five rings on the Olympic flag ______ the five continents that are joined together in the Olympic Games.
| A．belong to | B．stand for | C．take apart | D．pack up |
John and I _____ friends for eight years. We first got to know each other at a Christmas party. But we _____ each other a couple of times before that.
| A． | had been; have seen | B． | have been; have seen |
| C． | had been; had seen | D． | have been; had seen |
Visitors ______ not to touch the exhibits.
| A．will request | B．request | C．are requesting | D．are requested |
I _____ Ping –pong quite well, but I haven’t had time to play since the new year.
| A．played | B．will play | C．have played | D．play |
Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.
| A．is changing | B．has changed | C．will have changed | D．will change |
The mayor of Beijing says that all construction work for the Beijing Olympics _____ by 2006.
| A．has been completed | B．has completed |
| C．will have been completed | D．will have completed |