单项选择题 Since ____ of the market is controlled by large companies investing in each other, the message is doubly clear.two-thirdC、 second-threeD、 second-threes

单项选择题 Computers in ____ sectors have seen their shares tumble some 10%since the start of the year.protectedC、 keptD、 keeping

单项选择题 Thousands of service-company employees who work for big regulated industries may now also see their future ____.threatB、 threateningC、 threatenedD、 threading