Please remember _______ the plants while I’m away.
It’s surprising that your brother __________ some knowledge of the computer just by watching others working on it.
Students should involve themselves in community activities ___________ they can gain experience for growth.
It was in the room _________ he was born _________ the meeting was held.
More than 10,000 competitors from the world came to Beijing to compete __________ each other __________medals in 2008
Some scientists believe that ________ is no doubt ________ a cure for AIDS will be found.