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 21 to 24.

Is there life on Mars? Many people have (21 )…….about this question. Some writers of science-fiction think of people from Mars as little green creatures. Others imagine "Martians" as monsters with many eyes.

In studying this planet, astronomers have found that life may be possible on Mars. The first (22)……. of this is that Mars has seasons, just like Earth. In other words, Earth's seasons, such as spring or summer, occur on Mars too. Because these seasons exist, it may be possible for (23)…….and other higher (24)….. forms to be found on Mars.

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.

Most of us have a sweet tooth. We love to cat a cookie, a donut or a piece of chocolate. But have you noticed what often happens when you cat one? When we eat or drink sugary foods, the sugar enters our blood and affects part of our brain. We may feel better, but the good feeling stops and we just want another one. All tasty foods do this, but sugar has a particularly strong effect.

This is why many scientists believe that our love of sugar might be an addiction. In the body, sugar acts like an addictive drug, one that doctors recommend we all cut down.

It seems obvious now that too much sugar can harm us, but why is it harmful? In early human history, the body began storing sugar as fat to use as energy. Our bodies are efficient, so they need very little sugar. Today, the Western diet has the highest amount of sugar in history. There are also more high blood pressure and diabetes in the world. Some researchers believe that too much sugar may be the culprit.

How do we battle our sweet tooth? Doctors advise us to cut down on sweets. They recommend that we choose healthy foods for snacks. Nuts, dark chocolate and yogurts are some of them. Yet even healthy foods can have too much sugar. Yogurts that are advertised as low-fat can have 17 grams, about half the daily allowance. However, the less sugar you eat, the less you want. Exercise helps, too. Using facilities such as walking tracks and gymnasiums can help control our desire.

(Adapted from Reading Explorer 2. Paul MacIntyre et al, 2015)

What is the main idea of the reading?

Tom was the last student____ the classroom yesterday.

The x-ray_____in 1895.

Rewrite the following sentences without changing the meaning.

We have an apartment which overlooks the park. (Reduce the relative clause by using present participle)

Graduates have to fight for jobs in an increasingly (compete) market.

There are some hobbies that I ______  in for a while besides reading and collecting.

The man has decided to buy a motorbike. His car was stolen last week. (Use Relative Clause)

The underlined phrase "sweet tooth" in the passage refers to

10. Mike and Laura are talking about their plan for the weekend.

Mike: "Why don't we go out for a change at the weekend?"

Laura: ........

What would be a good title for the second paragraph?