Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

She turned the radio on at 7.30. She was still listening to it when her mother came home at 9.00

A. She has been listening to the radio at 7.30

B. She had been listening to the radio since 7.30

C. She has been listening to the radio after 7.30

D. She had been listening to the radio by 7.30

Mark the letter A, B, C, or D on your answer sheet to choose the sentence which is closest in meaning to the given one.

You are in this mess right now because you didn't listen to me in the first place.

A. If you listened to my advice in the first place, you wouldn't be in this mess right now.

B. If you had listened to my advice in the first place, you wouldn't be in this mess right now.

C. If you listen to my advice in the first place, you will not be in this mess right now

D. If you had listened to my advice in the first place, you wouldn't have been in this mess right now.

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 43 to 50.

          Carbon dating can be used to estimate the age of any organic natural material; it has been used successfully in archeology to determine the age of ancient artifacts or fossils as well as in a variety of other fields. The principle underlying the use of carbon dating is that carbon is a part of all living things on Earth. Since a radioactive substance such as carbon-14 has a known half-life, the amount of carbon-14 remaining in an object can be used to date that object.

          Carbon-14 has a half-life of 5,570 years, which means that after that number of years, half of the carbon- 14 atoms have decayed into nitrogen-14. It is the ratio of carbon-14 in that substance that indicates the age of the substance. If, for example, in a particular sample the amount of carbon-14 is roughly equivalent to the amount of nitrogen-14, this indicates that around half of the carbon-14 has decayed into nitrogen-14, and the sample is approximately 5,570 years old. 

          Carbon dating cannot be used effectively in dating objects that are older than 80,000 years. When objects are that old, much of the carbon-14 has already decayed into nitrogen-14, and the molecule amount that is left doesn’t provide a reliable measurement of age. In the case of older objects, other age-dating methods are available, methods which use radioactive atoms with longer half-lives than carbon has.

The word “it” in paragraph 1 refers to______.

A. carbon dating

B. the age

C. any organic natural material

D. archeology

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

Sports clear my mind. They also help me maintain a healthy lifestyle.

A. My mind is cleared so is the maintenance of a healthy lifestyle

B. Not only do sports clear my mind, but they also help me maintain a healthy lifestyle

C. Sports clear my mind so that I can maintain a healthy lifestyle

D. All that sports can do is to clear my mind instead of maintaining a healthy lifestyle

Mark the letter A, B, C or D on your answer sheet that is best made from the given prompts in the following sentences.

be sure/ good seat/ your tickets / should/ bought/ advance.

A. I'm sure about a good seat for your tickets should be bought in advance.

B. To be sure of a good seat, your tickets should be bought in advance.

C. To be sure of a good seat for your tickets should be bought in advance.

D. To be sure of a good seat, your tickets should be bought advance.