22.At my school, the ___ and dynamic students often play sports in the schoolyard at break time. (energy)

23. All the actors and actresses are called for a dress ___ at 10:00 at the school’s main hall. (rehearse)

24. New members must call the sports club’s customer service to ___ their membership card. (act)

25. Although Kevin lacks practical experience in the field of business, he holds the position of Sales Director ___. (event)

26. Olympic Games encourages all athletes, coaches and officials to follow the rules of good ___. (sport)

27. Learning to play a ___ instrument requires effort and determination. (music)

16. (she/ need) ______ some stamps for overseas mail?    

17. How much (be) ______ two local stamps?    

18. I hope I (meet) ______ the former President of the U.S. Barrack Obama one day.    

19. His brother often helps him (do) ______ his homework.    

20. Look at the black cloud! It (rain) ______. We should stop to find a shelter.   

21. Lan and her friends (rehearse) ______ a play at the moment.    

American teenagers like to attend young organizations in their free time.

       A                                                   B               C                    D

Choose the underlined part (A, B, C or D) that needs correcting

 American teenagers like to attend young organizations in their free time.
          A                                                 B              C                D

Mấy bạn chọn từ sai giúp mik 

Although my classmates are studying very heard for the final exams, we have fun ______ together at recess.

    A. play    B. to play    C. is playing    D. playing

Our company helps __________ (vacation) with organizing tours to Europe.

Her main __________ (interesting) are reading and travelling. 

 We hold this ________ (celebrate) to show our respect to our teachers.

She is sitting __________ (important) behind a big desk.

 It’s __________ (typically) of him not to talk much in a meeting.

Our company helps __________ (vacation) with organizing tours to Europe.

Her main __________ (interesting) are reading and travelling. 

I found this man __________ (interest) after talking to him a few times. 

The teacher is __________ (interest) in listening to her students’ questions.

 We hold this __________ (celebrate) to show our respect to our teachers.

She is sitting __________ (important) behind a big desk.

 It’s __________ (typically) of him not to talk much in a meeting.

 My child is learning German with a __________ (localize) teacher.

 There is always a strange __________ (collect) of runners in this competition.

 This is a good chance for __________ (collective) to show their special stamps.

 Ann _____________ (usually/do) the shopping, but today she ______ (not/do) it because she ___________ (not/be) well.

 She is so annoying. She __________ (always/call) me too late at night.

 _______________ (you/understand) what the lecturer is saying?

 When you ___________ (arrive), my friend will take you to the hotel.

 I can’t attend your party because I __________ (have) a meeting tomorrow.

 After a hard day on the farm, we felt so tired but we had fun work together.

                                 A                          B             C                    D

She will definite win the first prize because she is the best of all the singers.

                 A                                         B                         C                         D

 My sister works less hours than me; however, she earns more money.

                               A                       B     C                                   D

 Take some day off from work and rest at home until you get better.

    A                     B                                   C            D

It’s a true that keen students like Hoa work about 45 hours a week.

            A              B                   C             D

. Cho hàm số được xác định như sau : y = f(x) = \(\left\{\dfrac{x+1\text{ khi }\ge0}{-x+1\text{ khi }< 0}\right\}\) 

a) Tính f(3); f(-3).

b) Có cách nào viết gọn công thức trên không ?