51 be made of 由……制成(制成以后还看得见原材料)

　　52 be not sure 表不确定

　　53 be on a visit to 参观

　　54 be popular with sb 受某人欢迎

　　55 be quiet 安静

　　56 be short for 表**的缩写 eg： 陶 is short for 陶俊杰

　　57 be sick in bed 生病在床

　　58 be sorry to do sth be sorry for sb eg ： I am sorry for you

　　59 be sorry to hear that

　　60 be sorry to trouble sb eg ： I am sorry to trouble you

　　61 be strict in doing sth 严于做某事 eg ： He's strict in obeying noles

　　62 be strict with sb 对某人要求严格 eg： Some students are not strict with them selves 这些学生对自己不严格

　　63 be strict with sb in sth 某方面对某人严格

　　64 be supposed to do 被要求干什么

　　65 be sure 表确定

　　66 be sure of doing sth 对做某事有信心 eg： He is sure of winning I am sure of learning English well

　　67 be sure of sth 对做某事有信心 eg： I'm sure of my head (my teacher 我相信我的大脑(老师)

　　68 be sure that sth 对做某事有信心 eg： I'm suer that he can pass the test 我相信他能通过考试

　　69 be sure to do sth一定会做某事eg： We are sure to pass the test 我们一定会通过这次考试 We are sure to learn English well 我们一定能学好英语

　　70 be terrified of + 名/动doing 害怕……

　　71 be terrified to do sth 害怕做某事

　　72 be the same as … 和什么一样

　　73 be used to doing sth 习惯做某事

　　eg： My father is used to getting up early 我爸爸习惯早He is used to sleeping in class 他习惯上课睡觉

　　74 be worth doing 值得做什么

　　75 be(feel) afraid to do sth 害怕做某事be afraid of sth 害怕某物 be afraid that 丛句

　　76 because+句子 because of +短语

　　eg ： He was late because he had a headache He was late because of his headache

　　77 begin to do = start to do 开始做某事 start…with…=begin…with… 以什么开始什么

　　eg ： Let's begin the game with the song I begin to go home