bài 1 : giải phương trình:

a. \(\sqrt{x+2\sqrt{ }x-1}=2\)

b. \(\sqrt{x^2-4x+4}=\sqrt{4x^212x+9}\)

c.\(\sqrt{x+4\sqrt{ }x-4}=2\)

d. \(\sqrt{x^2-6x+9}=2\)

e. \(\sqrt{x^2-3x+2}=\sqrt{x-1}\)

f. \(\sqrt{4x^2-4x+1}=\sqrt{x^2-6x+9}\)

In the Vietnamese town of Vong Nguyet, silk-making has been an important business for 1,200 years. Many of the village people keep silkworms in their living rooms. Each basket contains hundreds of silkworm caterpillars. Throughout the village of Vong Nguyet, people turn the cocoons into silk thread. The first step is to heat the cocoons so that the silk becomes loose. The end of each cocoon must be found by hand and spun together.

The old spinning machines haven’t changed much for over a thousand years. The modern machine has been designed for a finer, higher quality silk thread. It is much faster, but the ends of the silk fibers still have to be found by hand. Once the silk thread is made, it will leave Vong Nguyet and be sent to the weaving town of Van Phuc. Here the silk is made ready for the weaving machines, called looms.

The process of weaving Silk is very slow and the machines must be watched all the time. It takes around two and a half hours to make one meter of silk material. After a lot of work on the part of man and moth, the silk cloth is finally completed. Despite the invention of cheaper materials, natural silk is still loved for its beauty and comfort. This amazing product of man and moth continues to be extremely popular around the world.

1.         What is the passage mainly about?

        A. The origin of silk making                                          B. The reasons why silk is popular

        C. The process of making silk cloth                               D. A silk village in Viet Nam

2.         Where do most people in Vong Nguyet keep silkworms?

        A. in kitchens                                                                  B. inside baskets In the living rooms

        C. in bedrooms                                                               D. on the floor

3.         Which of the following is TRUE about mordern spinning machines?

        A. They produce better silk threads.

        B. They are completely different from the old machines.

        C. The old machines are faster than the mordern ones.

        D. People no longer have to find the ends of silk fibers by hand thanks to them

4. Which of the following CANNOT be done by machines?

        A. Weaving silk                                                              B. Finding the end of cocoons

        C. Spinning cocoons                                                       D. Making silk thread

5. Why is natural silk popular all over the world?        

        A. Because it is luxurious,                                              B. Because it is hard to make.

        C. Because it is expensive.                                             D. Because it is comfortable.

1.             After the class (be)_______ over, ask the teacher about that exercise.

2.             I (come)_______ and (see)_______ you before I (leave)_______ for London.

3.             We (go)_______ home as soon as we (complete)_______ our work.

4.             I (send)_______ you some postcards as soon as I (come)_______ to London.

5.             I (wait)_______ here until you (come)_______ back from work.

1.This opportunity_______at just the right time for me.

A. took over                            B. turned down                       C. turned up                            D. closed down

2. I have_______the description of each product, so I decide to buy this one.

A. found out                            B. passed down                       C. set up                                  D. looked through

3. The Rocky band has just_______their third album.

A. dealt with                           B. lived on                              C. turned up                            D. brought out

4. They_______the money they earn from selling handicrafts.

A. bring out                             B. live on                                C. find out                               D. take over

5. The lacquer workshop was_______by a new owner.

A. taken over                          B. brought out                         C. found out                            D. lived on

6. Technology changes so fast that it’s hard to_______it.

A. live on                                B. look through                       C. run out of                           D. keep up with

7. We have_______materials to make the handicrafts that you require, so could you please wait a few days?

A. faced up to                         B. come back                          C. run out of                           D. looked forward to

8. Liam_______about the lacquerware exhibition on the local newspaper.

A. brought out                         B. found out                            C. turned down                       D. dealt with

9. He can’t accept the fact that his workshop is going to be_______.

A. closed down                       B. come back                          C. looked through                   D. turned up

10. I hope everyone in the world_______each other.

1. The artisan has_______the wood into the shape of an eagle.                

A. wove                                  B. carved                                 C. moulded                             D. embroidered

2. They were anxious to_______the original character of the village.                

A. remind                                B. treat                                    C. attract                                 D. preserve

3. My grandmother has_______a pair of wool gloves for me.                

A. carved                                 B. knitted                                C. moulded                             D. wove

4. I will show you how to_______a metal coin.                        

A. embroider                           B. knit                                     C. cast                                     D. weave

5. A loom is a piece of equipment for_______cloth.

A. knitting                               B. embroidering                      C. weaving                              D. carving

6. I am surfing the Internet to learn how to_______chocolate.                

A. weave                                 B. knit                                     C. embroider                           D. mould

7. James always_______his sculptures with chemicals to preserve them.                

A. treats                                   B. moulds                                C. casts                                   D. reminds

8.        You have to wait until the first_______of clay dry before you add the next one.

A. frame                                  B. layer                                   C. surface                                D. thread

9.        The museum has several life-size_______of people and animals.

A. sculptures                           B. artisans                               C. lacquerware                        D. frames

10. Despite its certificate of_______, the painting was found to be a fake.

A. attraction                            B. tradition                              C. truth                                    D. authenticity

11. How many balls of wool did you need to_______        that scarf?

A. weave                                 B. knit                                     C. mould                                 D. embroider

12. Ashley is_______this painting as a gift for her elder sister’s housewarming.

A. knitting                               B. weaving                              C. embroidering                      D. carving

13. The children_______little pots out of clay.

A. carved                                 B. moulded                             C. cast                                     D. embroidered

14. They_______these baskets from strips of willow.

A. wove                                   B. embroidered                       C. knitted                                            D. cast

15. Nancy painted the window_______carefully in order that no paint got onto the glass.

A. layers                                  B. surface                                C. lacquerware                        D. frames

16. Life in London has so many_______: night clubs, good restaurants and so on.

A. frames                                B. attractions                           C. interests                              D. layers

17. David_______his name on his pencil.

A. carved                                 B. embroidered                       C. moulded                             D. wove

1. I (read) __________ 3 books of Nguyen Nhat Anh so far.

2. I (not know) __________ the answer. Please (tell) __________ me.

3. What __________ you (do) __________now? - We (play) __________soccer.

4. When I was a child, I (use/play) __________ marbles.

5. Where (be) __________ your mother? - She (be) __________in the bathroom. Maybe, she (have) __________ a bath.

6. My father (jog) __________ twice a week.

7. Look! The bus (come) __________.

8. I want you to stop (act) __________ like that.

9. Yesterday, on the way home, I stopped (buy) __________ a cup of milk tea.

10. Do you mind if I (stand) __________ here?

11. Mai (brush) __________ her teeth after meals.

12. Would you like (take) __________ a photo?

13. Be quiet! I (study) __________.

14. It is very exciting (see) __________ that film.

15. Mr. Hung (be) __________ a doctor. He (work) __________ in a hospital in the city centre. Everyday he (catch) __________the bus to work.

16. What __________ your father (do) __________now? - He (plant) __________ trees in the garden.

17. My father (smoke) __________ a lot two years ago. But he (give) __________ up smoking.

18. Would you mind (help) _____helping_____ me with this task?

20. I hate (eat) __________ spicy food.

21. Up to the present, I (paint) __________ 4 pictures.

22. Long (watch) __________ TV an hour everyday.

23. Would you mind if I (use) __________ your computer?

24. My sister (listen) __________ to music in her free time.

1. Although we had given her an invitation card, she didn’t arrive. (show)

2. The scientists among countries in Asia have worked together on the project of technological development for a long time (ages)

3. The explorer said “ We invented some kinds of anti-aging pills to help people live longer last year.”

4. We left the building, then a tornado appeared suddenly and caused life loss and property damage. (After)

5. A team of archeologists dug an ancient tunnel with the aid of heavy machinery. (was)