1.call up 观察call up在句中的含义和用法。1). I called up my father and told him the news.2). Your letter called up the days when we worked together fifteen years ago.3). They were called up right at the beginning of the war.call up给打电话, 回忆， 征召入伍.根据括号内的汉语提示完成下列句子。1). _ （我昨天晚上给你打电话） but no one answered the phone.2). _（我被征召入伍） three months after the war broke out.3). The music _ （音乐让人想起往日时光。）【知识拓展】call on sb.拜访某人，号召 call at sp. 拜访某处call back 回电话call off 取消call for 要求，需要，去接某人 call in 邀请召集练习：1). As I grew up in a small town at the foot of a mountain, the visit to the village _ scenes of my childhood. A. called up B. called for C. called on D. called in1). Does the train _ every station？ 2). The concert was_on account of some reason 3). _me_tomorrow; my number is 536291. 4). Ill_my uncle at Beijing Railway Station. 5). Im going to_my first teacher this eveningcall on后跟人，at拜访地。up回忆起， for要去接人。call for爱呼吁，需要得满足。2. distinguish 观察distinguish在句中的含义和用法。1). The twins were so much alike that it was hard to distinguish one from the other.2). How do you distinguish between a star and a planet?3).The man distinguish himself by his wisdom.distinguish A from B 区分A与Bdistinguish between A and B 区分A与Bdistinguish oneself 显扬自己, 使自己扬名拓展：distinguished adj. 卓越的，著名的 be distinguished for 因而著称be distinguished as 作为而著名be distinguished by 以为特征3. convenient adj_adv. 便利地；方便地；_n. 便利；方便；拓展 convenience n. 方便，合适at ones convenience 在某人方便的时候for convenience 为方便起见1).A bicycle is often more convenient than a car in towns.2).Will it be convenient for you to start work tomorrow?3).If it is quite convenient to her, we will visit her next Tuesday.常见结构有：it is convenient for sb. to do sth. 对某人来说做是方便的sth be convenient to/for sb. .对某人来说是方便的