B) He can eat half a pound of jelly beans a day.
C) He didn't eat any fat.
D) His coach gave him a lecture.
33 . Prof. Barbara's experiment proved that __.
A) two groups ate the same amount of calories
B) two groups ate the same amount of yogurt
C) the “low fat” yogurt group ate significantly more calories later in the day than the other group
D) people increase the number of calories they eat per day and gain weight
34. According to the author, __ has less calories.
A) fat B) protein and carbohydrates
C) amino acid D) sugar
35 . What can you infer from the passage?
A) To keep from being overweight, people have to eat non-fat food.
B) The calories from fat just do it a little quicker than that from protein and carbohydrates.
C) People should avoid temptation.
D) Americans realize that it is necessary to count calories before eating the food.
Questions 36 to 40 are based on the following passage:
The plumes of ash came billowing from Mount Etna on July 17 at precisely 1:33 p.m., followed by 300-foot blasts of lava. Below, in the resort town of Nicolosi, Italy, anxious residents prayed for protection. But scientists were jubilant.
“ Three minutes,” gushes Gene Ulmer, a Temple University geologist. “That's all they missed by.” Not only did Ulmer witness the eruption (which killed no one), he was in Nicolosi the previous night when European volcanologists（火山学家） predicted that Mount Etna would erupt at 1:30 p.m.— one of the most accurate predictions in history.
Scientists have historically had little success in predicting eruptions. There are instruments to monitor the geophysical changes that may suggest a volcano is ready to blow—increase in tremors, alterations in the mountain's tilt, or changes in the resistance of the earth surrounding it. Other instruments track volcanoes' chemical compositions, because rising levels of ammonia, carbon dioxide, sulfur dioxide, water and other substances can also herald eruptions. But none of these instruments has done particularly well.
So scientists have taken to monitoring as many different aspects of volcanic activity as possible. This broader approach appears to have yielded the stunningly accurate results at Etna. “We may have finally found the right combination of instrument to monitor volcanoes—and save lives,” says Ulmer.
It is, of course, possible that the Etna team just got lucky. Nonetheless, Ulmer says, “all of us in volcanology are very excited.”
36. Volcanologists were surprised by __.
A) the accuracy of their own predictions of eruption of Mount Etna
B) the eruption of Mount Etna
C) the instruments they had used
D) the ash and smoke of Mount Etna
37. Which instruments are the most effective ones to predict the eruption of volcanoes?
A) Instruments to monitor the geophysical changes.
B) Instruments to track volcanoes' chemical compositions.
C) The combinations of instruments.
