21.The moment we heard the news of the earthquake, we began to ________ the work to rescue those who were trapped in the building.
She took off the old dress and her friend___
The workers painted one of the sides of the board yellow,and___
Obama has been elected___first black president of the United States,and the international society expects to have___new USA under his leadership
When you drive the car,you can never be___careful to do it
I am delighted___as chairman of the students’ union last winter