结合材料回答下列问题：

①近几年全国各地接连发生由于司机超速、超载、酒后驾车撞人致死的恶性交通事故。河南灵宝市司机王卫斌醉驾宝马连撞多人，造成6死6伤的惨剧。

上海司机庆某酒后驾车肇事，连撞4人，2人死亡。

②为实现素质教育，强健体魄。各校纷纷开展“阳光体育”。

    These are Cara and Ben. They are twins (双胞胎). They are twelve. This is their bedroom. It's a nice room. There are two beds in the room. The yellow bed is Cara's and that green one is Ben's. The twins have one desk and two chairs. The chairs look the same. Cara's sweater is on his bed. Ben's coat is on his chair. Their clock, books and pencil-boxes are on the desk. Their schoolbags are behind the chairs.

关于我国土地资源的叙述，正确的是（    ）。