và đi đến kết quả 

 có 10 giá trị thỏa mãn. Chọn B.

Đáp án C

Đặt m + e x = a ; e x = b a ≥ 0 ; b > 0  ta có:

m + b = a m + a = b ⇔ m + b = a 2 m + a = b 2

  ⇔ m + b = a 2 b − a = a 2 − b 2 ⇔ m + b = a 2 a − b a + b + 1 = 0 ⇒ m = a 2 − b a = b

( Do a ≥ 0 ; b > 0 )

Khi đó m = b 2 − b b > 0  

Do b 2 − b ≥ − 1 4 ∀ b > 0  nên phương trình có nghiệm khi m ≥ − 1 4

Do đó có 10 giá trị nguyên của  m ∈ − 1 4 ; 10 thỏa mãn yêu cầu bài toán.

đồng hồ 1: two-fifty/ ten to two
đồng hồ 2: three-fifty/ ten to four
đồng hồ 3: five- twenty-five
đồng hồ 4: twenty to eight
đồng hồ 5: five to nine
đồng hồ 6: ten fifteen
đồng hồ 7: ten to eleven
đồng hồ 8: five to twelve
đồng hồ 9: five to one
Kiểm tra lại nhé, học tốt!

Thank you for seeing me off at the airport last night

I picked up a lot of English during my stay with you.

Thanks again for your hospitality 

1. How far /it/ your company/ where you live? It/ about/ 10/ kilometre.

____How far is it from your company to where you to live ? It is about 10 km__________________________________________________________

2. How far/ it/ Jane’s apartment/ her school?

__How far is it from Jane's apartment to her school?____________________________________________________________

3. My father and I/ not/ use to/ spend/ time/ with/ each other.

My father and I didn't use to spend time with each other______________________________________________________________

4. This man/ use to/ be/ famous/ actor?

____Did this man use to be a famous actor?__________________________________________________________

5. There/ not/ use to/ be/ many vehicles/ in the streets/ when/ I/ be/ young.

There didn't use to be many vehicles in the streets when I was young______________________________________________________________

6. My family/ use to/ go sailing/ every/ weekend/ but/ now/ we/ not.

_____My family used to go sailing every weekend but now we don't_________________________________________________________

7. Her mother/ use to/ kiss/ hug/ her/ when/ she/ be/ kid.

____Her mother used to kiss and hug her when she was a kid__________________________________________________________

8. Mrs Smith/ not/ use to/ do/ morning exercises/ but/ now/ she/ do/ regularly.

__Mrs Smith didn't use to do morning exercises but now she does it regularly ____________________________________________________________

Ex 1

1.B

2.A

3.D

4.C

5.A

Ex 2

1.A

2.B

3.C

4.D

5.A

EX 3: GIVE CORRECT FORM OF THE VERBS IN PRESENT SIMPLE OR PRESENT CONTINUOUS TENSE.
1. Listen! My mother (sing)___is singing__________________a song.
2. Every night, We (go)_____go_______________to bed at 10 p.m
3. Giang (like)___likes__________Music but I (like)_____like____________Math
4. Now, they (stay)_____are staying____________________in Hue .
5. My father (read)___reads ____________________a newspaper in the morning
6. Look! Ha (run)_is running____________________.
7. Trang usually (listen)__listens_____ to the teacher in the class, but she (not listen) ___isn't she listening______now.
8. Where _____is____________ your father(be)?(am/is/are)
-He (be)__is______ living room. He (watch) ___is watching__________TV.
9.do they _go__  (go) to school by bus today?
10.There(be)__are________many flowers in our garden.
11.Everyday, Mr.Hung (not go)____doesn't go_________________to work by car.
12.In the autumn, I rarely (go)__go_____ sailing and (go)___go____________ to school.
13.I (write)am writing a letter to my friend now.
14.At 12 a.m every day, I (have)___have________ lunch and (go)go________ to bed.
15.On Monday, I (have)__have__________ math and Art.

1.is singing 

2.go

3.likes /like

4.are staying 

5.reads 

6.is running 

7.listens/is listening

8.is /is/is watching 

9.do they go

10.are

11.doesn't go

12.go/go

13 .am writing 

14 have /go 

15.have

have worked

has studied

have seen

have lived

have got

1. How long (you/ live)HAVE YOU LIVED in Hanoi? I (live)HAVE LIVED there for 10 years.

2. Mr. Nam (work) HAS WORKED in this factory for 10 years. 

3. We (learn)HAVE LEARNED in the same class since 1999.

4. Lan (be)HAS BEEN to the USA for 2 years.

5. I (read)HAVE READ this book for two hours.

6. We (not see) HAVEN'T SEENeach other since last week.

7. We (live) LIVED in London ten years ago.

8. My sister (start)STARTED  a new job last week.

9. She (not write)HASN'T WRITTEN to me since she (leave)LEFT here.

10. She last (meet)MET him 2 years ago.

11. He (learn)HAS LEARNED English since 2001.

12. Nothing (change) HAS CHANGED since I moved here.

13.  They (not contact)HAVEN'T CONTACTED to each other for a long time.

14. He (wear)HAS WORN the same coat since he (move)MOVED here.

15. John and I (be)HAVE BEEN pen pals for nearly 3 years.

16. We (not see)HAVEN'T SEEN this movie yet.

17. We (not begin)DIDN'T BEGIN to study English in year 6.

18. Mr. Johnson (work)WORKED  in the same place as me three years ago.

19. They (go)WENT to Nha Trang last summer.

20. They (do)DID the test well yesterday.

21. It’s a good idea (take)TO TAKE  warm clothes to Sa Pa.

22. It’s not necessary (bring)TO BRING food to Ha Long Bay because we can enjoy seafood there.

23. This film is the best one I (ever/ see).HAVE EVER SEEN

24. I (not see) HAVEN'T SEEN  him since he (leave)LEFT this school.

25. My father (work)HAS WORKED for the Garment factory since 1987

25. We (spend)SPENT several weeks in Ha Long bay last summer.

26. LAN and NGA (not finish)HAVEN'T FINISHED their homework yet.

27. They enjoy (live) LIVING in Nha Trang.

28. I (not see) HAVEN'T SEEN your bother recently.

29. Where (he/ spend)DID HE SPEND his summer vacation last year?

30. The letter I (receive)RECEIVED  yesterday is on the desk.