单项选择题
As early as in 1647 Ohio made a decision that flee, tax-supported schools must be established in every town to have 50 households or more. （）
A．has B．having C．having had D．had
单项选择题 Were it not for the timely investment from the general public, our company would not be so thriving as it is. （）
单项选择题 He stood aside, registering the vivacity of the school life. （）
单项选择题 We hope that the measures to control prices, （）taken by the government, will succeed.
