Cho tam giác nhọn ABC, AD là đường cao. Vẽ các điểm M, N sao cho AB là trung trực của DM, AC là trung trực của DN. Gọi E, F lần lượt là giao điểm của MN với AC, AB. CMR: a) Tam giác AMN cân b) DE+EF+DF=MN c) DA là phân giác góc EDF d) Giao điểm các đường phân giác của tam giác DEF và trực tâm tam giác ABC trùng nhau

Cho biểu thức M=\(\left(\frac{x-\sqrt{x}+2}{x-1}-\frac{1}{\sqrt{x}-1}\right).\frac{x+2\sqrt{x}+1}{2x-2\sqrt{x}}\)với x>0, x khác 1
a) Rút gọn M
b) Tính giá trị của a để phương trình M = a có nghiệm
c) Tìm x để \(\frac{1}{M}-\frac{\sqrt{x}-1}{8}\ge1\)

. Choose the words whose underlined part is pronounced differently from that of the others in each group

1. A. put B. adult C. junk D. sun

2. A. itchy B. riding C. sick D. swimming

3. A. chemical B. children C. headache D. architect

4. A. regularly B. identify C. really D. healthy

5. A. cycling B. doctor C. aerobics D. calories

6. A. coordinate B. triathlon C. allergy D. calorie

7. A. leaf B. life C. knife D. of

8. A. monopoly B. melody C. compound D. concentrate

9. A. paragraph B. cough C. although D. enough

10. A. vegetarian B. depression C. essential D. attention

11. A. myth B. cycling C. itchy D. allergy

12. A. headache B. spread C. health D. weak

13. A. fat B. leaf C. of D. safe

14. A. flu B. sunburn C. junk D. much

15. A. wash B. wear C. wake D. wrap

16. A. sick B. swimming C. itchy D. riding

17. A. really B. healthy C. regularly D. identify

18. A. bad B. tall C. dad D. sad

19. A. although B. enough C. paragraph D. cough

20. A. traditional B. essential C. audition D. picture

21. A. attract B. actor C. guitarist D. gallery

22. A. delicious B. special C. musical D. physician

Choose the words whose underlined part is pronounced differently from that of the others in each group

1. A. put B. adult C. junk D. sun

2. A. itchy B. riding C. sick D. swimming

3. A. chemical B. children C. headache D. architect

4. A. regularly B. identify C. really D. healthy

5. A. cycling B. doctor C. aerobics D. calories

6. A. coordinate B. triathlon C. allergy D. calorie

7. A. leaf B. life C. knife D. of

8. A. monopoly B. melody C. compound D. concentrate

9. A. paragraph B. cough C. although D. enough

10. A. vegetarian B. depression C. essential D. attention

11. A. myth B. cycling C. itchy D. allergy

12. A. headache B. spread C. health D. weak

13. A. fat B. leaf C. of D. safe

14. A. flu B. sunburn C. junk D. much

15. A. wash B. wear C. wake D. wrap

16. A. sick B. swimming C. itchy D. riding

17. A. really B. healthy C. regularly D. identify

18. A. bad B. tall C. dad D. sad

19. A. although B. enough C. paragraph D. cough

20. A. traditional B. essential C. audition D. picture

Put the verbs in brackets in the correct verb form.
1. I (think) that mountain-climbing is very dangerous.
2. My father (like) collecting stamps so much.
3. She (take) a lot of photos when she (go) on holidays.
4. I like drawing very much. My hobby is (paint) .
5. My mother says when she (retire) , she (go) back to her village to do the
gardening.
6. your sister (like) (make) model in her free time?
7. My brother (promise) that he (give) me a nice doll on my birthday.
8. Duong says he loves horse-riding but he (not/ continue) this hobby from next year.
9. My aunt (play) the guitar once a week.
10. Don't worry. I (dance) with you next Sunday.