What lesson China can draw from ____ financial crisis (金融危机) in the United States has become _____ hot topic in Beijing..
The book about environment ______ the importance of protecting the earth.
It was ______ back home after the experiment.
________ with the size of the whole earth, the biggest ocean does not seem big at all.
I would appreciate ______ if you could write to me as soon as possible.
They often quarrel with each other about small things, which they couldn’t ________ finally.