Phân tích đa thức thành nhân tử(tách hạng tử)
1)x^2+2x-3=x^2-x+3x-3=x(x-1)+3(x-1)=(x-1)(x+3)
2)x^2-5x+6=x^2-2x-3x+6=x(x-2)-3(x-2)=(x-2)(x-3)
3)x^2+7x+12=(x+3)(x+4)
4)x^2-x-12=(x-4)(x+3)
5)3x^2+3x-36=3[(x-3)(x+4)]
6)5x^2-5x-10=5[(x-2)(x+1) ]       
7)3x^2-7x-6=(x-3)(3x+2)
8)4x^2+4x-3=4x^2+6x-2x-3=(2x-1)(2x+3)
9)8x^2-2x-3=8x^2+4x-6x-3=(4x-3)(2x+1)
 

He delayed (telling) her the (news), (waited)=>waiting for the (right moment)

I. Supply the correct verb form:

1. Where’s Mary? She (listen) ___is listening_______________ to a new CD in her room.

2. Don’t forget to take your umbrella with you today. You know it (be) ___is__________  the raining season now.

3. Jean always (learn) __learns________ English at this time every day but today she (not study) __isn't studying_____ at the moment.

4. What time ___does the meeting happen_________ (the meeting/ happen) tomorrow? I (not know) ________haven't known___________ it yet. I (wait) _______will wait__________ for the announcement.

5. Where ____have you lived___ (you/live) since you moved from your old house?

6. Look! The sun (rise) ____is rising______ over the ocean. This is the most amazing scene I (ever/ see) _____have ever seen_________.

7. He (speak) ____speaks_____ Japanese so well because He (come) _____comes______ from Japan.

8. _____Do you usually go___ (you/ usually/ go) for Christmas or ___Do you stay______ (you/stay) at home?

9. Look! Your friend (hold) ____is holding_______ some roses. They (look) _______look_____ lovely.

10. _______have u finished______ (you/ finish) your assignment yet? No, I ____haven't____________.

11. My father usually (walk) __walks________ to work but now he(drive) ___________is driving_______ his car.

13. My grandparents (bring) ___have brought_________ me up since I was very small.

14. How long _____has peter worked_______ (Peter/ work) in his firm?

16. I (just/ realize) ___have just realized____ that there are only four weeks to the end of them.

17. This is the second time I (be) _have been____ to London.

18. Now the children (not want) ___don't want____ to go to sleep. They (prefer) ____prefer_______ their mother to tell them bedtime stories.

20. Jim (cook) _____is _____ so tired now. He (work) _______has been working_________ non-stop since the morning

1. They (go) ___went __________ home after they (finish) _____had finished________ their work

2. The children (play) ____were playing_________ football when their mother (come) ____came_________ back

3. What (he /do) ____did he do_________ when he (be) _____waws________ young?

4. What (you/do) ____were u doing________when the phone (ring)______rang_____?

5. She (already, see) _________has already seen____ Dr. Rice. (she/ever/know)         ____Has she ever known_______him?

6. We (often/ come) ___often come__________ to the stadium, but  today we (watch)___are watching______the match at home.

7. He (sit) ______sits_______ in a café everyday although  he (not/like) ___doesn't like_______(drink) ____drinking___ coffee.

8. They (not eat) _____won't eat________ such kind of food next week.         

9. Many houses ( damage) ____were damaged__________ because of the storm last night.

10. After they (go) _____had gone________, I (sit) _____sat________ down and (rest) ______rested_______

11. Yesterday John (go) ___had gone__________ to the store before he (go) ____went_________ home

12. After taking a bath, he (go) _____went________ to bed

13. A bridge (build) ___was being built____________at this time 2 years ago.        

14. If she (work) ___works_____too , she will be tired . 

15. Would you like (hang out)___to hang______with me? What about (go) ___going_____ to the cinema.

16. Tom (see) _____saw________ a serious accident while he (stand) _____was standing________ at the bus stop

17. If John and I (not/get)_____didn't get______ to the theatre, they would get surprised.

18. English ( speak) ______is sopken_______ all around the world.

19. They (not/see)______haven't seen________ eachother since they (leave) __left_____school.

cố lên nốt đi "cao" nhânn

Hãy cho dạng đúng của các động từ trong ngoặc.

1.My mother always(heat).....heats.....the pan before(use)...using.....it.

2.Yesterday my sister(put)..put.......too much salt in the fish soup.It(taste)..tasted......awful.

3.How about(go)...going.....to Dong Xuan market and(buy)...buying....something to eat?

4.If it is rainy tomorrow,we(not go).....won't go....ao a picnic in the mountains.

5.My mother is in the kitchen.She(cook).......is cooking...The food(smell)...smells....delicious now.

6.Would you like to come to my house for dinner next Sunday?

  -I'm sorry.I(visit)....am visiting......my grandfather.

1.   Nam said “I am told to be at school before 7 o’clock”

…Nam said that he was told to be at school be4 7 o'clock……………………………………

2.   Thu said “All the students will have a meeting next week”

………Thu said that all the stds would have a meeting the following week………………………………

3.   Phong said “My parents are very proud of my good marks”

……Phong said that his parents were very proud of his good marks …………………………………

4.   The teacher said “All the homework must be done carefully”

…The teacher said All the homework had to be done carefully……………………………………

5.   Her father said to her “You can go to the movie with your friend”

……her father told her she could go to the movie with her friend…………………………………

6.   Hoa said “I may visit my parents in the summer”

……Hoa said that she might visit her parents in the summer…………………………………

7.   The teacher said “We can collect old book for the poor students”

……the teacher said they could collect old book for the poor stds…………………………………

8.   She said “She doesn’t buy this book”

……she said she didn't buy that book…………………………………

9.   The boys said “We have to try our best to win the match”

…the boys said that they had to try their best to win the match……………………………………

10.        Her classmate said “Lan is the most intelligent girl in our class”

…her classmate said Lan was the most intelligent girl in their class……………………………………

11.        They told us “Our friends will get the award for their highest cores”

……… They told us their friends would get the award for their highest cores………………………………

12.        He said “I will go to school by bus tomorrow”

…he said he would go to school by bus the next day……………………………………

13.        Phong said “I need to learn more vocabulary”=>Phong said he needed to learn more vocabulary

của Hải tất nhé 

u la troiii. dài quá !

. Choose the correct option A,B,C,D to complete the sentences

1. Listen! Who .  . B .  .  .  in the bathroom?

A. sings               B. is singing            C. are singing          D. sing

2. What do you usually .  .  .B  .  .  for breakfast?

    A. to have            B. have                   C. having                D. has

3. My friend, Nga is very hard-working. She .  .  D  .  .  most of her time studying last year.

   A. to spend           B. spends                C. spending             D. spent

4. Mount Everest is .  .  C.  .  .  mountain in the world.

   A. higher              B. highest                C. the highest          D. the higher

5. This street is .  .  D.  .  .  than that one

   A. quiet                B. more quieter        C. more quiet           D. quieter

6. In .  . B .  .  .   lessons, we learn about writers, poems and write essays.

   A. History            B. Literature           C. Science              D. Geography

7. My classroom is .  .  .D  .  .  the second floor.

   A. in                     B. at                        C. behind                 D. on

8. Sometimes people set off .  . A .  .  .  as the New Year begins.

   A. fireworks         B. flowers               C. trees                   D. banh chung

9. - Where’s the bank? – Go straight, . .  . B.  .  .  the second turning on the left. It’s on your right.

   A. cross                B. take                    C. go                       D. turn

10. I can’t come right now. I .  . C .  .  . when I finish my homework.

   A. am coming       B. come                  C. will come            D. comes

11. “.  . D .  .  .  do you play the piano?”  – “Once a week.”

   A. How much       B. How long            C. How far              D. How often

12. He .  .A .  .  .  me the way to the centre.

   A. shows              B. says                    C. ask                      D. all are correct

13. .  .  .D  .  . go to the cinema?

   A. Would you like B. What about         C. How about          D. Shall we

14. My parents always say that I .  .  C.  .  . take things without asking.

  A. needn’t             B. mayn’t                C. shouldn’t             D. won’t

15. Hanh is usually early .  .  .B  .  . school because she gets up early.

  A. on                     B. for                      C. at                        D. to

16. – “What would you like to drink now?” – “.  .D  .  .  .”

  A. No, thank you   B. Yes, please         C. I like to do nothing          D. Orange juice, please

17. The children look very .  .  B.  .  . while playing games at breaktime.

  A. excite               B. excited                C. exciting               D. excitement

18. My father is coming home for Tet. We .  . C .  .  . a very happy time.

  A. will to have       B. having                C. will have             D. won’t have