The vegetation layers in Cat Ba Archipelago form spectacular and scenic landscapes and make the site become ....... of all Vietnam's typical ecosystems.

Choose the word whose underlined part is pronounced differently: stayed, borrowed, kissed, enjoyed

Like any other universities, the Open University can give you a degree. However, you don’t have to ___(26)___ working to study. It can also open up a whole variety of interest. If you have ___(27)___ studied before, you will enjoy the special, new pleasure of increasing your knowledge. You will make friends of all kinds. You may also find that your qualification provides new career opportunities.

You don’t actually ___(28)___ to the Open University for lectures, but study at home, using television, radio and computer software. You can ___(29)___ one class a month if you wish at an Open University center. Of course, there are exams to take, as in any universities. If you ___(30)___ like to know more, all you have to do is complete the form below. It could be the start of a wonderful new period in your life.

Choose the word whose stress is placed in different position from that of the rest: disappearance, increasingly, situation, economic.

Though called by sweet-sounding names like Firinga or Katrina, tropical cyclones are huge rotating storms 200 to 2,000 kilometers wide with winds that blow at speeds of more than 100 kilometers per hour (kph). Weather professionals know them as tropical cyclones, but they are called hurricanes in the Caribbean Sea, typhoons in the Pacific Ocean, and cyclones in the Indian Ocean. They occur in both the northern and southern hemispheres. Large ones have destroyed cities and killed hundreds of thousands of people.

Tropical cyclones begin over water that is warmer than 27 degrees Celsius (80 degrees Fahrenheit) slightly north or south of the earth’s equator. Warm, humid air full of water vapor moves upward. The earth’s rotation causes the growing storm to start to rotate around its center (called the eye). At a certain height, the water vapor condenses, changing to liquid and releasing heat. The heat draws more air and water vapor upward, creating a cycle as air and water vapor rise and liquid water falls. If the cycle speeds up until winds reach 118 kilometers per hour, the storm qualifies as a tropical cyclone.

Most deaths in tropical cyclones are caused by storm surge. This is a rise in sea level, sometimes seven meters or more, caused by the storm pushing against the ocean’s surface. Storm surge was to blame for the flooding of New Orleans in 2005. The storm surge of Cyclone Nargis in 2008 in Myanmar pushed seawater nearly four meters deep some 40 kilometers inland, resulting in many deaths.

The building is the highest one in our city. It was destroyed in the earthquake. (using participle)