For the new country to survive, ________ for its people to enjoy prosperity, new economic policies will be required.
我国社会主义改造完成之后，占统治地位的经济形式是 ______。
The terrible noise is ______ me mad.
General Motors, one of the world's largest auto manufacturers, is expanding its ________ in this country.
________ the concert had begun did we realize what a splendid show it was going to be.
