Ahousingbubbleisanec的精选

问题详情：Ahousingbubbleisaneconomicsituation________occurswhenhousepricesrisemuchtoofast.A．which B．where C．what D．why【回答】A[考查定语从句。指物的先行词situation在从句中作谓语动词occur的主语，所以用关系...