• Give the correct form of the words in the brackets to complete the passage below. 

       I turned 16 last week. And I have to say that (0. INITIAL) ___INITIALLY___, I didn’t enjoy my birthday much. I usually get seme birthday (1. GREET) _______________ from my friends on social media. But nobody wished me a happy birthday, which was a bit (2. DEPRESS) _______________ .

       After school, I noticed that the friends I usually walk home with had all (3. APPEAR) _______________, so: walked back alone. But then when I got back to my house, there were lots of (4. DECORATE) _______________ and balloons on the outside. ‘OK,’ I thought, ‘this looks more (5. PROMISE) _______________ ’ So I went inside, and there, waiting in the sitting room, where all of my school friends! Seeing them there was so (6. EXPECT) _______________ ! Together with my parents, they’d a ranged this surprise party. And they’d done it all without my (7. KNOW) _______________ ! In fact, it was probably the most special and (8. MEMORY) _______________ party ever!

• For questions (1 - 8), read the text below and think of the word which best fits each gap. Use only one word in each gap. There is an example at the beginning (0).

                                                                                                      BLUE DIAMONDS

  Blue diamonds are the world’s most expensive diamonds, with some valued (0) ...... AT....... over 350 million US dollars. However, no one knew (1) ............... recently precisely where these rare stones came from.

  Most diamonds are formed from pure carbon under extreme heat 150 to 200 kilometers underground, and (2) ............... is thought that volcanic eruptions bring them to the earth’s surface. Research by scientists has revealed, however, that blue diamonds were probably formed somewhere (3) ............... 600 and 800 kilometers down, in a part of the earth’s interior known (4) ............... the lower mantle.

  These researchers analyzed 46 blue diamonds, all of (5) .............. contained minerals only found in the lower mantle. (6) .............. only were these stones formed four times nearer the earth’s core (7) ............... normal diamonds, but they also contain an element called boron that is mostly found on the earth’s surface. What seems to have happened, (8) ............... to the researchers, is that billions of years ago, rocks containing boron were carried down into the lower mantle by movements of the earth’s tectonic plates, and were eventually returned to the surface by volcanic action.

Bài 1:

a/ Cho phương trình \(x^2+mx-2=0\). Chứng minh phương trình luôn có nghiệm ∀m.

b/ Tìm m để phương trình có 2 nghiệm x1, x2 thỏa \(x_1^2+x_1x_2+x^2_2=6\)

• Supply the correct form of the word in brackets: 

1, Vietnam's coastlines and islands are currently ______________ difficult changes that seriously threaten the country's territorial sovereignty. (EXPERIENT)

2, In 1947, the proclamation of ______________ and "fighting hunger and ignorance" campaigns started under the framework of the New Democratic Republic of Vietnam. (DEPEND)

3, The _______________ of huge quantities of air pollution outside of the home appears to be important in metal forging. (PRODUCE)

4, Some ______________ consider that the proximity or the difference between culture and civilization reliances on the substance of the culture and civilization. (SOCIAL)

5, The beginning of the Egyptian year coincides with the _______________ of a particular star called Sirius, following a long period of invisibility. (APPEAR)

6, The danger of such rapid growth could breed hubris or a sense of _______________, that could expose the economy to risks, said panelists at a forum in Dubai. (CONFIDENT)

7, By taking a hard look at individual project components, project managers can zero in on more ______________ alternatives. (EFFECT)

8, Furthermore, the government undertook to cover smoking-related illnesses under Medicare at a time when Washington was well aware of the _____________ of tobacco. (HEALTH)

9, It has been suggested that some of the work done by art ________________ whose concern is with theory rather than practice, ignores and indeed denies the aesthetic experience. (HISTORY)

10, Car owners should have their own formally approved emissions regulations if attainable so that they can ensure ______________ results from any police allegations. (SATISFY)

• Complete this text below by adding the following words in the correct place. Use each word once.

(depend/ result/ participate/ co-operate/ approve/ rely/ succeed/ apologize/ insist/ consist/ concentrate/ believe)

     I try to (0) .......participate....... in as many sports as I can at school, but to be honest I’m pretty hopeless! Anyway, last week I decided I’d try to get onto the school relay team, as they’re considered really cool. And amazingly, after some running trials, I actually (1) ................... in getting a place – only as a reserve for competitions, but still! Then I realized that was just the beginning. The other team members didn’t exactly object to a newcomer, but I could tell they didn’t totally (2) ................... of my being there. As I said, the team (3) ................... of the best sportspeople in the school, so joining them was a real honor. And any races they were in usually (4) ................... in a win. Anyway, the annual school sports day was coming up, so I thought I’d better start practicing. 

     Finally, sports day came, and I was as well prepared as I could be. And I knew my friends all (5) ................... in me, so that helped a lot. But just then we heard that another team member had been injured, so they’d be (6) ................... on me to help them win. This was my chance. I started (7) ................... as hard as I could on the task ahead. 

     I was incredibly nervous waiting for the runner behind me to pass me the baton. But suddenly there he was – and I was off! And guess what? I ran faster than any other members of the team – and we won! It was fantastic! But the best part was that after the race, the rest of the team (8) ................... on carrying me around the track on their shoulders. I’ll never forget it!