41) Hard to tell . It could be the name of a magazine . 难说。这可能是一份杂志的名称。
42) I find it difficult to reach a conclusion . 我觉得难下结论。
43) I wonder whether I can get the money back . 我不知道我能否把钱取回来。
44) — Is that true ?
— Maybe , I\'m not sure .
45) — Will he come ?
— Perhaps not .
46) — Can you play basketball with me now ?
— I\'m afraid not . I\'ll have to finish my homework first .
47) — May I borrow your bike ?
— Certainly . / Sure .
48) — Can you dance ?
— I certainly can . / I sure can .
49) I think he\'s coming , but I\'m not quite sure .
50) She is certain to do well in the examination .
2、Model Dialogues 交际示范
A
Tom：David told me he was not well .
Bob：Why , I saw him playing football on the playground just now .
Tom：Are you sure ?
Bob：No mistake , I\'m one hundred percent sure .
B
Qin：What\'s special tomorrow , do you know ?
Liu：Yes , it\'s Teachers\' Day .
Qin：What are you going to give our maths teacher for Teachers\' Day ?
Liu：I\'m not sure . Maybe I\'ll give her some flowers . What about you ?
Qin：I\'m not sure whether she likes a card or a book .
Liu：Maybe she likes a book better .
Qin：Ok then . I\'ll give her a new book on computer .
C
A：We don\'t have much time , so listen to me . I\'ll tell you what we are going to do . The man we want does everything at exactly the same time every evening . I\'ve watched him for three days .
B：You don\'t think he\'ll change his plan tonight , do you ?
A：I\'m sure he won\'t . At 7 o\'clock he\'ll come down those stairs and go into the restaurant next door .
B：Are you sure he\'ll eat in that restaurant and not in another one ?
A：He\'ll eat in that one .
B：We\'ll have to be careful when we go into the restaurant to get him .
A：We won\'t go into that restaurant . We don\'t want him to see us .
B：What will we do ?
A：We will wait for him in the street . We\'ll get him when he finished eating and leaves the restaurant .
3、交际测试一角
1）— Wll the talk last long ?
— .
A. I\'m afraid it will . B. Yes , the talk lasts .
C. No , the talk doesn\'t last D. Not at all . I\'m sure to 〖答案选 A〗
2）— Where does she come from ?
— , but her accent suggests Beijing .
A. You can know with your eyes and ears B. She comes from a hospital
C. Perhaps she is a Beijinger D. I\'m not sure 〖答案选 D〗
Unit 2中的交际要点： Determination , Decision And Insistence (决断和坚持)
在表明自己对事物的判断时，好坏要明确，是非要分明。对就是对，错就是错，决不要含糊其辞。尤其在对方干得比较出色时，要多加鼓励。如：Well done ! Good job ! Quite perfect ! 等。
如果要陈述自己的某些观点时，英语中一般要使用一些较委婉的短语，如：In my opinion (依我看)；As I see it (在我看来) ；So far as I know （据我所知）；Personally speaking (就我个人而言) 等。
在中国的文化背景里，陈述自己的看法、观点之前，常常这样说：依本人之愚见、我谈一点不太成熟的看法、跟大家交换一点肤浅的认识、我发言的目的是抛砖引玉，等。如果直译过去，西方人会大吃一惊，他们认为：既然是“未成熟的”、“肤浅的”，为何不以后再谈，现在不是没必要吗？既然是砖，又何必要抛呢？因此。在跨文化交际中，切忌用词的过分谦虚或委婉。下面是有关如何进行决断和坚持的相关知识：