1. She is such a good tennis player that she wants all her matches.

=> She plays tennis well enough to want all her matches. (enough)

2. I'm too short to reach the shelf.

=> I'm so short that I can't reach the shelf. (SO)

3. The wether is too cold for us to swim in.

=> The weather isn't warm enough for us to swim in. (ENOUGH)

=> It's such cold weather that we can't swim in. (SUCH)

4. The package isn't too heavy for you to lift by yourself.

=> The package is weak enough for you to lift by yourself. (ENOUGH)

=> It's such a weak package that you can lift by yourself. (SUCH)

5. It was such cold weather that there was ice on our car windscreen.

=> The weather was cold enough for our car to have ice on it. (ENOUGH)

6. It was such a great book that I read it three times.

=> The book was great enough for me to read it three times. (ENOUGH)

7. The weather was so cold that we cancelled the trip.

=> The weather wasn't warm enough for us to continue the trip. (ENOUGH)

- Nowadays, with the development of technology and science. The Internet plays a very important role in our life.

Firstly, the Internet is considered as a source of information. We can sit at home to read news, watch events happening in the country and around the world. We also know what the weather is like all day. Besides we can communicate with our friends and relatives.

Secondly, the Internet is a source of entertainment. Thanks to the Internet, we can sit in the room and play games, watch movies. We can also read stories and listen to music. It really helps us to escape from stress after a hard working day.

Finally, the Internet is a means of education. Today we can take part in a lot of schools online. We can also join self - study classes, self - study courses. We stay at home, but we can learn the same lessons as school.

In conclusion, the Internet has become very important in our life. It is a wonderful invention of a modern life. It makes our world a small village.

My brother has no ............. in football.

A. interested

B. interesting

C. interestingly

D. interest

The students are not allowed ..............noise in the class.

A. make

B. having made

C. making

D. to make

|x(x+5)| = x

< = > x = 0 

Theo tính chất dãy tỉ số bằng nhau ta có:

\(\frac{x+y}{z}=\frac{y+z}{x}=\frac{x+z}{y}=\frac{x+y+y+z+z+x}{z+x+y}=\frac{2\left(x+y+z\right)}{x+y+z}\) = 2

x+ y/z = 2 

2z = x + y

Vậy z = 2 

46. D

47. B

48. C

49. D

50. C

36. A

37. B

38. C

39. C

40. D

41. B

42. C

43. C

44. C

45. D

31. B

32. B

33. A

34. C

35. C

\(\frac{x+y}{z}=\frac{y+z}{x}=\frac{x+z}{y}=\frac{x+y+y+z+x+z}{x+y+z}=\frac{2\cdot\left(x+y+z\right)}{x+y+z}=2\)

x+y=2z

=> kz=2z

=>k=2