III) Give correct form or tense of the verb

16. A lot of trees (blow)..............down in the storm last night

17. As far as I know, she (not come).............................back yet

18. He (send).........me a very nice letter a few days ago

19. John wishes he (have)................a mountain bike.

20. How much time do you spend (surf)................the web a day?

VI) Rewrite the sentences

39. It's a pity i can't go to the farewell party tonight

      I wish.................................................................

40. The last tim we played football together was in 1999

      We haven't..........................................................

41. Thousands of people saw his paintings

      His paintings.......................................................

42. "Do you want me to type your report, Susan?" Jim asked

      Jim askes............................................................

I) Give correct form of the word.

11. Children seem to have lost their............in reading (enjoy)

12. Visitors were really impressed by the...........of the villagers (friend)

13. The Chinese class is..........., but English is................(option - compel)

14. There has been a great............in his English (improve)

15. I'm not very good at German, but i can make myself...........(understand)

Rút gọn:

\(\dfrac{2\cos^2\alpha-1}{\sin\alpha+\cos\alpha}\)

Bài 3: Cho biểu thức P= \(\dfrac{\sqrt{x}+1}{\sqrt{x}-2}+\dfrac{2\sqrt{x}}{\sqrt{x}+2}+\dfrac{2+5\sqrt{x}}{4-x}\)

a) Rút gọn P nếu x ≥ 0, x ≠ 4

b) Tìm x để P = 2

Bài 2:

Cho biểu thức E= \(\left(\dfrac{\sqrt{x}+1}{\sqrt{x}-1}-\dfrac{\sqrt{x}-1}{\sqrt{x}+1}+4\sqrt{x}\right):\left(\sqrt{x}-\dfrac{1}{\sqrt{x}}\right)\)

a) Rút gọn E

b) Tìm x để E= 2

c) Tính giá trị của E khi x=\(\left(4+\sqrt{15}\right)\left(\sqrt{10}-\sqrt{6}\right)\sqrt{4-\sqrt{15}}\)