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Questions 35-37 According to the text which THREE of the following conditions have been scientifically proved to have a psychological effect on humans? Choose THREE letters A-G and write them in boxes 35-37 on your answer sheet. [A] lack of negative ions [B] rainy weather [C] food consumption [D] high serotonin levels [E] sunny weather [F] freedom from worry [G] lack of counselling facilities 【35】______