To be admitted to a key university, _______.

A．our parents always impress on us the importance of hard work

B．some universities attach great importance to students’ grades

C．all the students in senior 3 are making every effort to study hard

D．good grades are quite necessary

2003年非典疫情暴发，北京、广州被宣布为疫区，除了哪项之外，当地政府报经上一级政府批准后可以采取下列紧急措施

A．限制或者停止集市、影剧院演出或者其他人群聚集的活动

B．停工、停业、停课

C．封闭或封存被传染病病原体污染的公共饮用水源、食品及相关物品

D．把患者带离出境

E．封闭可能造成传染病扩散的场所