2016高考英语一轮课件优化复习（山东专用）人教版必修三《Unit4 Astronomy：the science of the stars 》天文学：恒星科学_高考复习指南

2016高考英语一轮课件优化复习（山东专用）人教版必修三《Unit4 Astronomy：the science of the stars 》天文学：恒星科学

　　B．unless C．when

　　D．because 解析：选D。根据语意看，后面的句子表示“没有必要的原因”，所以用because。本部分内容讲解结束按ESC键退出全屏播放辨析puzzle/question

　　puzzle 令人迷惑的、难以理解或回答的问题。 question 主观提出的或需解决、决定的问题。 ①(牛津P1616)What puzzles me is why he left the country without telling anyone. 令我不解的是，他为什么悄悄地离开了这个国家。 ②The police are still puzzling_about/over how the accident could have happened. 警察仍然正在苦思这起事故是怎么发生的。 ③Scientists have been trying to solve this puzzle for years. 多年来科学家们一直试图解开这一谜团。 ④(牛津P1616)He looked puzzled so I repeated the question.他好像没听懂，于是我又把问题重复了一遍。 3pull　n. & vt.

　　拉(力)；拖；牵引力 (教材P30)As the rocket rose into the air,we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity.　随着火箭的升空，由于我们在努力挣脱地球的引力，我们被向后推在座位上。 pull down拆毁；摧毁 pull in(车辆)进站停靠；靠边停靠 pull out驶出；退出 pull through康复；痊愈归纳拓展 ①He pulled the door open and rushed out. 他拉开门，冲了出去。 ②(牛津P1604)The police car signalled to us to pull_in. 警车发出信号，要我们驶向路边停靠。 ③We waved as the train pulled out of the station. 火车驶出车站时我们挥手告别。 ④The doctor told me that I would pull_through. 医生告诉我，我会康复的。【助记】跟踪训练 Ⅰ.选词填空 system；harmful；exist；climate；pull 1．I consider it ________ for students to play computer games. harmful 2．As far as I know，they are paid hardly enough to _______ on. 3．A focus and concern on ________ change is entirely appropriate. exist climate 4．You have to enter your password before entering this ______. 5．Cheer up！Take more exercise every day and you will