1.       ________ the coffee? It smells good. 

           A. Who made                   B. Did who make               C. Whom made                D. Who is made

2.       ________? - Not bad. 

           A. How are you                B. Who are you                  C. Where are you from D. What are you

3.       ________ at Christmas? – I went home for Christmas. 

           A. What did you do for              B. For what did you do     C. Where did you went D. What did you do

4.       ________? – I left on December 5th. 

           A. When do you leave     B. When did you leave      C. Why did you leave      D. How did you leave

5.       ________? – The USA, but now he is living in London. 

           A. Where does John come from                                  B. Where is John living 

           C. How long has John lived in London                      D. What does John do in the USA      

6.       ________there? – I spent three wonderful weeks there.

           A. How often did you stay                                         B. How far you stayed 

           C. How long did you stay                                           D. How long you stayed

7.       ________from here to Australia? – I do not know exactly but it takes eight and a half hours by plane.

           A. How long is it              B. How often is it              C. Which distance            D. How far is it

8.       Peter has practiced playing the piano ________the piano contest which is going to be organized next week.

           A. so that he could enter for                                       B. to enter for 

           C. in order to enter for                                                D. all are correct

9.       Our actions express our love more than any words can do.

           A. help                              B. create                             C. perform                        D. show

10.  He shouted crazily. He seemed to lose control his emotions.

           A. delights                        B. entertainments               C. communications           D. feelings

11.  Music is very much an integral part of our life.

           A. essential                       B. unnecessary                   C. impolite                        D. encouraged

12.  Jazz is combination of America and Western European music.

           A. mixture                        B. occasion                         C. instrument                    D. emotion

13.  She is a popular singer but her records have never got into the top ten.

           A. delightful                     B. famous                           C. proud                           D. ideal

14.  Ao Dai is the Vietnamese __________ costume.

           A. communicative            B. expensive                       C. traditional                    D. occasional

15.  __________is traditional music of a country.

           A. Jazz                              B. Folk music                     C. Pop music                    D. Classical music

16.  Can you play any __________ instruments? – No, I can’t.

           A. music                           B. musical                           C. musically                      D. musician

17.  The band played only sad and __________ pieces of music during the funeral.

           A. joyful                           B. hopeful                          C. delighting                    D. solemn

18.  ‘Tien Quan Ca’, the Vietnam national __________was written by Van Cao.    

           A. folk song                     B. anthem                           C. epic                              D. pop song

19.  I am used to listening to a __________of music before going to sleep.

           A. sheet                            B. piece                              C. bar                                D. slice

20.  Music is a wonderful kind of ________, which is the passion of many people, young and old alike.

           A. entertain                      B. entertainer                      C. entertainment               D. entertaining

21.  Her appearance was quite different__________what I had expected.

           A. in                                 B. from                               C. with                             D. to

22.  Our achievements are something to be proud__________.

           A. for                                B. at                                    C. of                                 D. in

Một tế bào có bộ NST 2n=18, tế bào này nguyên phân 5 lần.

a) Tính số tế bào con thu được sau 5 lần nguyên phân?

b) Các tế bào con sinh ra có bộ NST bằng bao nhiêu?

c) Nếu một trong các tế bào trên đang ở kì giữa của nguyên phân thì chúng ta đếm được có bao nhiêu NST kép?