During the discussion, Jack ______pointed out that blogs are better than books for their convenience, lower price, and larger range of writing while others kept silent.
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.
Visitors ______ not to touch the exhibits.
I _____ Ping –pong quite well, but I haven’t had time to play since the new year.
Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.
The mayor of Beijing says that all construction work for the Beijing Olympics _____ by 2006.