中学英语单词用法复习知识点open和opinion和opera等
open['əʊp(ə)n]
adj.敞开的，开着的||v.•打）开，开放
► He opened the window and looked out.他打开窗户往外看。
短语：1.open up 打开
eg.：computers help us to open up our eyes to the outside world .
电脑帮助打开了我们对外面世界的眼界。
【易错警示】open与turn on
Open 表示“打开”，指打开书本、门窗等。例如Don’t open the door；it is so cold outside.不要打开门，外面太冷了。
Turn on 表示“打开”，指打开电视，电灯，煤气，自来水等开关。例如：Turn on the TV. I want to watch the sports program.打开电视，我要看体育节目。

opera['ɒp(ə)rə]
n. [C]歌剧
We have taken a box at the opera.  我们已经在歌剧院定了个包厢。
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新概念英语第二册答案

operation[ɒpə'reɪʃ(ə)n] 
n. [C, U]①手术;②操作，运转
► Will II need to have an operation?我需要做手术吗？

opinion [ə'pɪnjən]
n.[C，U]①看法，见解;②评价，主张;③舆论
► The boss has a very high opinion of him.老板很器重他.[have a( n)…opinion of sb. /sth.对某人/某事物有……的评价]
短语：1. in one’s opinion 以某人的意见
eg. In my opinion, she should stay at home .
依我看，她应该待在家里。

or[ɔː]
conj.①（表示选择）或者；②(表示不确定）大约；③否则，要不然
► Hurry up，or you’ll be late.快点，否则你会迟到的。
► Either you or I am to go.你我之间总有一个人要去。[either... or...要么......要么......，连接并列主语，谓语动词和最近的主语保持一致]

选择填空
36. Jack wants _______ cards with his friends after school.
A. play              B. to play          C. have              D. to have
37. In China, When old people(老人) celebrate(庆祝) their birthdays, they usually eat ____.
A.  B.      C.    D.  
38. ---Are they our new teachers?
---Yes. Let _____ say hello to ______
  A. we; they            B. us; they          C. we; them      D. us; them
39. Look! The clothes in that store are ______ sale.
A. of                B. with              C. to            D. on
40. ---Can I help you?
---Yes, please. I ______ a white T-shirt.
A. need        B. have              C. find          D. get
41. Mrs. Green has _______ daughters and Amy is her _______ daughter.
A．three; three  B．third; third      C. three; third  D．third; three
42. ---________ is that girl?  
--- She is 8.
A. What              B. How            C. What time        D. How old
43. ---Are you ______ now?
---Sorry, I’m very busy.
A. free        B. happy        C. old            D. late
44. --- _______ don’t you eat hamburgers?
   --- Because I don’t want to be fat.
   A. When      B. Where        C. Why          D. What
45. Those are ______ cups. They’re white and yellow.
   A. Peter and Cindy’s                  B. Peter’s and Cindy
   C. Peter’s and Cindy’s                  D. Peter and Cindy
答案：
36-40 BCDDA 
41-45 CDACC

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