Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

With clear evidence, his company couldn't deny having dump a large quantity of toxins into the sea.

The Queen Elizabeth is the largest ship which has been built on the Clyde.

We need to preserve the________of wildlife because each species has an important role to play.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 3 to 6.

Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit which he may count towards a degree. In many American universities the total work for a degree consists of thirty-six courses each lasting for one semester. A typical course consists of three classes per week for fifteen weeks; while attending a university a student will probably attend four or five courses during each semester. Normally a student would expect to take four years attending two semesters each year. It is possible to spread the period of work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice.

For every course that he follows a student is given a grade, which is recorded, and the record is available for the student to show to prospective employers. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs. Elections to positions in student organizations arouse much enthusiasm. The effective word of maintaining discipline is usually performed by students who advise the academic authorities. Any student who is thought to have broken the rules, for example, by cheating has to appear before a student court. With the enormous numbers of students, the operation of the system does involve a certain amount of activity. A student who has held one of these positions of authority is much respected and it will be of benefit to him later in his career.

How many classes each week would a student normally attend at least?

I started writing this essay hours ago and it's still not right.

Each unit of the course book focuses ________a different grammar point.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 27 to 30.

Recognized as a World Heritage Site in Vietnam, Ha Long Bay attracts thousands of visitors every year, who come to enjoy its magnificent natural (27) ____. However, the bay is also facing a number of threats thatmay lead to serious damage to the site. Wildlife in Ha Long Bay is being destroyed by overfishing as this is the only job to support most of the inhabitants here. As a (28) ____, rare sea creatures may become extinct soon.

Another 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 including plants and fish also depend (29) ____ the mangroves.

What is more, some markets in Ha Long Bay sell unusual relics and natural objects, such as coral pieces, sea shells, or unique stones, probably illegally removed from the (30) ____ areas. Many of these items, converted into rings, key chains, and other souvenirs, are purchased by unsuspecting tourists. Buying these items creates a black market leading to further destruction of Ha Long Bay.

As eco-tourists, we can help to protect Ha Long Bay for future generations in several ways. For example, by sailing or fishing with the fishermen, we can share the benefits of tourism with the local community.

According to paragraph 1, an American student is allowed ________.

There are many ways for us to reduce our ________in order to save our environment.

He was suspected of ________presents from the local companies and ignored their violations of the environmental law.

American university students are usually under pressure of work because ________.

Some of the participants who were invited to the conference couldn’t come because of the bad weather.