1. They (come)...........back home after they (finish).............. their work

2. She said that she (meet)............ Mr.Bean before

3. Before he (go)............... to bed, he (read).......... a novel

4. He told me he (not/ wear).............. such kind of clothes before

5. When I came to the stadium, the match (start)...............

6. Before she ( listen)................ to music, she (do)............ homework

7. Last night, Peter (go)........... tho the supermarket before he (go)...............home

MỘT MẢNH đất hình chữ nhật có chiều dài 48 m, chiều rộng 30 m . Hỏi chu vi mảnh đất hình chữ nhật đó là bao nhiêu mét

           THE MAN WHO FELL TO EARTH

 Buzz Aldrin was part of the Apollo 11 mission in 1969 when man first walked on the moon. Neil Armstrong went first, followed by Buzz. Nothing in all his training had prepared him for that moment, and he has been travelling the world ever since, reliving the experience. He was born in New Jersey in 1930, and he graduated from West Point Military Academy. He served as a pilot in Korea and West Germany, and in 1966 he was chosen as an astronaut.

 Apollo  11 was launched to the moon on July 16. Four days later they landed near the Sea of Tranquility. The mission ended on July 24, with a splashdown in the Pacific Ocean.

 On coming back to earth, he became very depressed, and suffered from alcoholism. He had married for the first time when he was younmg, and had three children. His second marriage lasted a very short time.

 Fortuntely, he seems to have found happiness and stability with his third wife, Loris Driggs Cannon, who saved him from self-destruction. They now live with their three dogs in California, and have six cars "for fun". He has written his autobiography and a sciece fiction book, called Encounter with Tiber, which was published in 1996. He now travels the world, giving lecture tours and raising funds for space exploration.

Questions:

1. When did man first walk on the moon?

_____________________________

2. How long did the mission last?

_____________________________

3. What did he suffer from when he returned?

_____________________________

4. What sorts of books has he written?

_____________________________

Cho A= \(\left[\dfrac{\sqrt{x}-4}{\sqrt{x}\left(\sqrt{x}-2\right)}\right]:\left(\dfrac{\sqrt{x}+2}{\sqrt{x}}-\dfrac{\sqrt{x}}{\sqrt{x}-2}\right)\)với x > 0, x khác 4

a) Rút gọn A

b) Tính A với x = 6-2\(\sqrt{5}\)

Complete the second sentence with the same meaning

1. Have you just used the computer?

-> You have______________?

2. Does your brother use the Internet everyday?

-> Your brother_______________? 

3. They first introduced the new stule of jeans in 2000, didn't they?

-> The new style of jeans was first________________?

4. You forgot to turn off the TV last night, didn't you?

-> You didn't______________?

5. Are they leaving here tomorrow?

-> Thye are______________?

Complete each of the following sentences with the correct tag

1. Don't turn on the TV until 8,______________?

2. Your father loves reading books, __________?

3. They don't usually go to the zoo every week, ____________?

4. Her sister listened to music last night, ____________?

5. She is playing tennis now,____________?

6. Your sister wasn't doing the houisework at 6 p.m last night,____________?

7. He has learned English for 5 year,_________?

8. They aren't going to buy a new house next year,___________?

9. She will visit him tomorrow,___________?

10. You should go to bed early,___________?

11. I'm too impatient,___________?

12. Let's go out for a drink,_____________?

Cho biểu thức: N= \(\left(1+\dfrac{a+\sqrt{a}}{\sqrt{a}+1}\right)\left(1-\dfrac{a-\sqrt{a}}{\sqrt{a}-1}\right)\)

a) Rút gọn N

b) Tìm giá trị của a để N = - 2016

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

a) Rút gọn P

b) Tính giá trị của P với a = 9

Cho biểu thức: A= \(\left(\dfrac{1}{\sqrt{a}-3}+\dfrac{1}{\sqrt{a}+3}\right)\left(1-\dfrac{3}{\sqrt{a}}\right)\)

a) Rút gọn biểu thức sau A

b) Xác định a để biểu thức A > \(\dfrac{1}{2}\)