Passage #4 　　Recent studies have shown that air inside many homes, office buildings, and schools is full of pollutants: chemicals, mold, bacteria, smoke, and gases. These pollutants are causing a group of unpleasant and dangerous symptoms that experts call “sick building syndrome”. First discovered in 1982, sick building syndrome most often includes symptoms similar to those of the flu (watering eyes, headaches, and so on) and respiratory infections such as tonsillitis, bronchitis, and pneumonia.
47.Which of the follow is NOT a symptom of the “sick building syndrome”?
(A) watering eyes
(B) sore throat
(C) headache
(D) fractured bones