John usually goes to school by bus. He leaves (离开)his house at seven and gets to school at about seven twenty. His school is on the hill.

    From Monday to Friday John usually has four classes every day. He likes English. He wants to be an English teacher. He hopes he will go to the USA to study English one day. On Sundays, he often goes to the library with his friends, but sometimes they go to see movies.

材料一：萨德反导系统是美国全球“导弹防御系统”的一个子系统，号称“当今世界唯一能在大气层内外拦截弹道导弹的地基系统”。萨德反导系统的雷达可完成探测、搜索、跟踪和目标识别等多项任务，探测半径2 000多公里，能够覆盖大半个中国 。萨德入韩直接威胁了中国战略安全，所以，中国坚决反对。

材料二：未来对我国国家安全构成威胁的国内问题有：人口、水资源、城市化、民族矛盾等经济社会问题。

“Bob,           on the desk.” the teacher says.