1. Rút gọn
 A=\(\sqrt{2}\left(\sqrt{8}-3\right)+\sqrt{18}\)   
2.
a) Cho hàm số y=ax-3, biết đồ thị hàm số đi qua điểm A(-3:18). Tìm a và xác định công thức hàm số.
b) Trong mặt phẳng tọa độ Oxy, cho đường thẳng d có phương trình: y=(m+1)x-n. Viết phương trình của d, biết d đi qua điểm A(1:-1) và có hệ số góc bằng -3

1.1
a. \(\sqrt{12}\)-\(\sqrt{27}\)+\(\sqrt{4+2\sqrt{3}}\)
b. (\(\dfrac{\sqrt{a}}{2+\sqrt{a}}\) +\(\dfrac{4+a}{4-a}\) ).(2\(\sqrt{a}\) -a) với a ≥ 0, a ≠4
1.2 giải hệ phương trình \(\left\{{}\begin{matrix}3x-y=5\\2y-x=10\end{matrix}\right.\)
2. Rút gọn phương trình.
a) \(M=\dfrac{3+\sqrt{3}}{\sqrt{3}+1}\)
b) \(P=(\dfrac{\sqrt{x}}{\sqrt{x}-1}+\dfrac{2}{x-\sqrt{x}}):\dfrac{1}{\sqrt{x}-1}\) với x >0, x ≠1
3. a) giải hệ phương trình \(\left\{{}\begin{matrix}4x-3y=2\\3y+4x=-18\end{matrix}\right.\)
b) \(A=\left(\dfrac{\sqrt{x}}{\sqrt{x}+4}+\dfrac{4}{\sqrt{x}-4}\right)\dfrac{x+16}{\sqrt{x}+2}\) với x ≥0, x≠16
4. Tìm m để đường thẳng y=(2m-1)x+3 song song với đường thẳng y=5x-1
 

I.Tìm lỗi sai. (không cần sửa lại)
1. They can't decide who going first.
      A                  B                C     D 
2. He asked the children don't make too much noise.
      A              B                  C                       D
3. If I am in your shoes, I'd take it easy and try to forget it.
           A                                 B                  C              D
4. It is say that Ha Long Bay is one of the most extraodinary natural 
             A                                      B                                C
wonders will ever see.
                        D
5. My teacher suggested I studying harder to pass the exam.
               A                                  B            C                        D

1. Rewrite the second sentence so that it stays the same meanings.

35. Study hard, or you will fail your final exam.

à If  

36. He will take an English exam tomorrow.

à An English exam

37. “Why will you stay at home tomorrow?”, he said to me.

à He asked

38. The ring was very expensive. He gave it to her on her birthday 

à The ring

2. Complete the sentences, using the words given

39. It / be/ kind / you/ help/me / do/ washing-up .

à

40. Although/ weather/ not/ good/ we/ enjoy/ have/ holiday/ yesterday.

à

I. 
 

                                  WATER POLLUTION IN INDIA
Contamination of water from any external source that makes it (1)__________ to life is known as water pollution. (2)_____________ the fast industrial development and modern civilization, the problem of water pollution is (3)__________ day by day. The (4)_______________ sources of water pollution are domestic wastes, agricultural wastes, sewage disposal, industria wastes, radioactive wastes and oil leakages.
All the India rivers, including the holy river Ganga, have become hightly polluted today. However, the Ganga Action Plan to control it's water from pollution has not been proved (5)_____________. The (6)_____________ of water pollution is widespread. It causes many severe water-borne diseases.
According to WHO, 21 per cent of all (7)___________ diseases in India are water-borne diseases. Oil is the main pollution of the sea water. Huge tankers often dump oil into the sea. This act of dumping (8)______________ kills sea plants and animals.