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

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 interests.

The tour of the cave system is the main _______ for tourists in Phong Nha Ke Bang National Park.

When a student enters a college or university, he/she has to choose a main subject of study, which is called ___________.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

A(n) _________disease is an illness that can be passed from one person to another.

When people finish a postgraduate course, they can get a ____________.

Global warming is an increase in the average _______ of the earth’s atmosphere.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following sentences.

The building is the highest one in our city. It was destroyed in the earthquake.