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43.

A. The writer goes out every night.
B. The writer's parents worry when she goes out at night.
C. The writer worries when she doesn't go out at night.
D. The writer's parents only worry a little when she goes out at night.

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44.

A. The writer is good at maths.
B. The writer is not good at maths.
C. The writer's parents are good at maths.
D. The friend of the writer's brother is not good at maths.

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45.

A. The writer likes the friend.
B. The friend wants to help with more than the maths homework.
C. The writer only wants the friend to help with the maths homework.
D. The writer likes all her brother's friends.

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Why do we laugh? For years scientists have asked themselves this question. No animals laugh and smile----only human beings do. So does laughing help us to live longer? The answer seems to lie in that smiling and laughing help us to become less worried and calmer, preventing illnesses that are caused by stress. Laughing is really the best medicine.But if you’re unhappy, it can’t do you any good to smile, can it? That’s not true. It is clear that smiling works just in the same way weather you feel like smiling or not. Scientists in California asked a group of students to act five different feelings: happiness, sadness, anger, surprise and fear----just using their faces. Changes in their heart rate, blood pressure and temperature were recorded. Most of the feelings they acted didn’t cause changes, but when the students smiled, their heart rate and their blood pressure went down. That happened even though they were only acting! So even if we feel sad inside, smiling seems to make us feel better.Now, what makes us laugh? It seems that the answer to the question is far from simple. Everyone likes jokes, but we don’t laugh at the same ones. It depends largely on how old we are. There are some jokes, for example, that children love but older people might not find funny.46.In the first paragraph, the underlined word “stress” can be best explained as “__________”.

A. surprise and fear
B. work and duty
C. happiness and sadness
D. pressure and worry

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47.Which of the following statements is TRUE based on the passage?

A. Laughing helps us to live ten years longer.
B. If you are in a bad mood, smiling helps to make you feel relieved.
C. Our blood pressure can be influenced by five different facial expressions mentioned.
D. People, old and young, are likely to laugh at the same joke.

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43.

A. The writer goes out every night. B. The writer's parents worry when she goes out at night. C. The writer worries when she doesn't go out at night. D. The writer's parents only worry a little when she goes out at night.

44.

45.

47.Which of the following statements is TRUE based on the passage?

A. The writer goes out every night.
B. The writer's parents worry when she goes out at night.
C. The writer worries when she doesn't go out at night.
D. The writer's parents only worry a little when she goes out at night.