Guan Dong saved an old lady out of the Yangtze River. ______ great courage he showed!

Cloning plants is straightforward cloning animals is very complicated

Charles is believed_______ the floor yesterday; he is always helping others silently.

The problem with being a time waster is _____the online game playing often spills over into the periods of time that should be productive

Oh, dear! There isn’t enough _____ for us in the lift. Let’s wait for the next.