In the Olympic Games, only athletes who have reached the agreed standard for their event will be ______ as competitors．

Listen, there is some strange noiseThis machine must be________.-I think soYou must have it checked.[ ]

Please remember _______ the computers down when you leave the office.

Shawn returned to Iowa after the2008 Games， ， as is known to us， she had been broughtup and trained to be a gold medalist of gymnastics

More than 70 percent of the playground in our school __ covered by water now.