11. I didn't drink (not / drink) any beer last night.

12. She didnn't read (not/ read) the newspaper yesterday.

13. We didn't play (not / play) tennis yesterday because it was raining.

14. Where does she go (she / go)?

15. What do you do (you / do)?

16. Phuong ___return______________ (return) to Hanoi yesterday.

17. He ______traveled___ (travel) through the Middle East last year.

18. She ___watched______________ (watch) TV yesterday.

19. We ______bought___________ (buy) a new car last weekend.

20. What time did he get up (he / get up) yesterday?

21. What did you buy (you / buy) yesterday?

22. How did you go (you / go) to school yesterday?

23. What did she study (she / study) last night?

24. _Did______you bring her flowers yesterday?

25. ___Was____he __happy_________(happy) on his last birthday?

Diện tích bề mặt cần sơn là:

S_xq=2.π.R.h

      = 2.π.80/2.100

      =25132,74cm²

Vậy diện tích bề mặt cần sơn là 25132,74cm²

1.report

2.express

3. mentioned

4. effect

5.consequence

6.result

1.report

2.express

3.mentioned

4.effect

5consequence

6. result

How many classrooms are there at your/our school?

MUCH STUDENT-> ANY STUDENTS

4 Robert told me that his (A) father had flown (B) to(C) Dallas last year (D)

5 He always feels (A) left off (B) when his friend talk (C) about sports (D)

6 For more information , call our free-toll(A) number and speak (B) to a (C) custormer service representative (D)

7 He asked (A) his father where (B) to cope with(C) negative emotions (D)

8 Joan made (A) the laundry , washing (B) up , and housework holding(C) her with (D) one arm

Ta có MP=MN+NP

              = 3+5=8cm

=> MI=IP=MP/2(I là trung điểm MP)

=>  MI= 8/2=4cm

Vậy MI=4cm

a²-2a+6b+b²=-10

<=> a²-2a+6b+b²+10=0

<=> a²-2a+1+6b+b²+9=0

<=> (a-1)²+(b+3)²=0

<=> (a-1)²=(b+3)²=0

\(<=>\left[\begin{array}{} (a-1)^2=0\\ (b+3)^2=0 \end{array} \right.\)

\(<=>\left[\begin{array}{} a-1=0\\ b+3=0 \end{array} \right.\)

\(<=>\left[\begin{array}{} a=1\\ b=-3 \end{array} \right.\)

Vậy a=1;b=-3

\(B= \dfrac{m-n}{\sqrt{m}-\sqrt{n}}-\dfrac{m+n+2\sqrt{mn}}{\sqrt{m}+\sqrt{n}}\)

   \(= \dfrac{m-n}{\sqrt{m}-\sqrt{n}}-\dfrac{(\sqrt{m}+\sqrt{n})^2 }{\sqrt{m}+\sqrt{n}}\)

   \(= \dfrac{m-n}{\sqrt{m}-\sqrt{n}}-(\sqrt{m}+\sqrt{n})\)

  \(= \dfrac{m-n}{\sqrt{m}-\sqrt{n}}-\dfrac{(\sqrt{m}+\sqrt{n})(\sqrt{m}-\sqrt{n})}{\sqrt{m}-\sqrt{n}}\)

  = \(\dfrac{m-n-m+n}{\sqrt{m}-\sqrt{n}}\)

  = 0

    Vậy B =0