Recognized as a World Heritage Site in Vietnam, Ha Long Bay attracts thousands of visitors every year, who come to enjoy its magnificent natural (1) ____. However, the bay is also facing a number of threats that may lead to serious damage to the site. Wildlife in Ha Long Bay is being (2) ____ by overfishing as this is the only job to support most of the inhabitants here. As a (3) ____, rare sea creatures may become extinct soon. (4) ____ problem is deforestation of mangrove forests. The mangroves, known as the plants native to Ha Long Bay, provide protection during storms, preserve the shoreline, and act as a natural filter that keeps the sea environment clean and healthy. Numerous wildlife species (5) ____ plants and fish also depend on the mangroves.

1. A. middle                B. main                       C. landscape                D. point

2. A. destruction         B. destroyed                C. destructing              D. destroy

3. A. instant                 B. example                  C. accident                  D. result

4. A. Others                 B. Other                      C. Another                  D. One