根据短文理解选择答案。

      The students start arriving on our playground from about 8:45 am. Most of our children walk but some travel to school by car.

      The children wear a school uniform and carry their homework and lunch in a school bag.

      School begins at 8:55 a.m. The duty teacher blows a whistle and the children line up in their class groups. They wait quietly for the teacher to send them to their classrooms.

      On arriving in their classrooms, the children empty their bags and put their homework in the marking boxes. The children then go back into their classrooms.

      The children do their early morning work while their class teacher takes the attendance register(考勤簿).The teacher reads out each child’s name in turn. At 9:10 a.m., the children go to assembly in our main hall. They sit on the floor in rows with the youngest children at the front and the older children at the back. As the children go into the hall, they listen quietly to the music playing.

近年来，中国和韩国申请世界文化遗产之战愈演愈烈。继中国传统节日“端午节”被抢注以后，近来，韩国有计划将中国的“风水”、“中医”甚至汉字列为世界文化遗产向教科文组织申报，对此，我们应有的态度是（      ）

下列各句中，没有语病的一句是 （    ）

科学家找到火星表面存在流动的液体水的“强有力”证据！北京时间2015年9月28日23：30左右，美国国家航空航天局（NASA）召开新闻发布会，宣布这一“重大科学发现”：科学家利用NASA火星探测轨道飞行器（MRO）上搭载的成像光谱仪，在这颗红色星球表面的神秘条痕中找到了在水中沉淀形成的水和盐物质。他证实了水──尽管是咸水──流淌在现今火星的表面上。材料表明（　　）

①世界的物质性不断得到科学发展的证明

②宇宙探测的目的在于验证科学家们提出的假说

③物质是依赖于意识，并能为意识所反映的客观实在

④世界上没有不可认识的事物，只有尚未认识的事物。