最低生活保障家庭的人口状况、收入状况、财产状况发生变化的，应当及时告知乡镇人民政府、街道办事处。（）
Support structure under the Main St Bridge has corroded ----- faster than the bridge ’s designer had predicted.
The director decided to delegate some of the work to a subcontractor after his employees ----- help with the project.
消费者在购买时介入程度最高的消费品的类型是()。
Ms. Arroya says that when workshop ----- begins to slow down, it may be time to hire more workers.
