先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。

    Hello，everyone!My name is Tony．Welcome to our school lost and found1．You can always2 some books or other things somewhere in me school because of the some careless(粗心的)students．Some students3 them and send them here．

    Look!There is a nice pen.There's also a black bag4some books in it.Oh,here is Kate's 5on the bag.I think it's6．Look at the pencil case(铅笔盒)．There is a pen and two erasers in it．Under the table there are two7．Some boys like 8basketball after class．The basketballs are theirs,I think．Look at the cute toy dog．I don't know9 it is．

    So everyone，be10your things．

实验题

人体细胞中，一条染色体上有____个DNA分子，23对染色体上共有____个DNA分子．

材料一：治世不一道，便国不法古，故汤武不循礼而王，夏殷不易礼而亡。反古者不可非，而循礼者不足多。

——《商君书·更法篇》

材料二：秦王扫六合，虎视何雄哉。挥剑决浮云，诸侯尽西来。

——李白《古风》

材料三：孝武初立，卓然罢黜百家，表章六经，遂畴咨海内，举其俊茂，与之立功。……如武帝之雄才大略，不改文景之恭俭以济斯民，随诗书所称，何有加焉。

——《汉书·武帝传》