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. 

The fact that space exploration has increased dramatically in the past thirty years indicates that we are very eager to learn all we can about our solar system.

Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions. 

They've always encouraged me in everything I've wanted to do.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. 

Removing one's footwear before entering a home or a temple before worship _______ a sign of respect, humility, and submissiveness.

The woman ____________ about her son’s travelling because there is so much traffic on the narrow and crowded way to school.

The new shopping mall __________ next month and a grand opening ceremony is being planned.

Language belongs to everyone, so most people feel that they have a right to ______ an opinion about it.

Hanh will finish all her work __________.

The __________ time was a charm for Korea’s Pyeongchang 2018 Winter Olympic bid committee.

They decided ___________ to Japan for their summer holiday.

Mary met her second husband not long after her first marriage __________.

Americans believe in 'romantic' marriage - a boy and a girl are __________ to each other, fall in love, and decide to marry each other.

You are ________ only person whose opinion is of any value to me in the present regrettable circumstances.

These books aren’t yours, ____________?

Her new apartment is different __________ her old one.

The food at the new restaurant is __________ than the old one.

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

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions. 

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions. 

The word “scrape off” is closest in meaning to _________.

What can be concluded from the passage about sweets?

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 44 to 50.

      The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been  “primed” by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.

      Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.

      In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective.

      Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

Which of the following is NOT true according to the passage?

The word “plausible” in the passage is closest in meaning to _______.