When questioned, he was too shocked to give a(n) of what had happened when the attack took place.
When I opened the door, I found my father sitting in his chair, completely ______ in a magazine.
Some people said _____ that Copenhagen Conference 2009 didn’t reach any official agreement.
Only when you ______ what you have learned to practice ______ say you have made it.
We have every reason to believe that ______ 2010 World Expo in Shanghai will be ______ success.
. Running in the morning fresh air _________our health and we _________it.