Sustainable development is long-term ________which focuses on the environment and ________ natural resources.
I________that all windows are shut.I did it.
What ________surprise you gave us by wearing such funny________ at so serious a meeting!
You’d better ________your answers again before you hand the papers in.
When the newspaper boy got to a blue door,________,which frightened him away as fast as possible.
The plan to set up a new branch in Hainan was finally dropped,because the members on the board didn’t agree ________who and how to operate it.