问答题 1. Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work. You will then be given ONE minute to check through your work once more.
Please write the whole passage on ANSWER SHEET ONE.
Now, listen to the passage.

Popping Ears

When we travel by plane, our ears pop. ______
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【正确答案】

【答案解析】[听力原文]

Popping Ears

When we travel by plane, our ears pop. Our ears pop because of the change in air pressure / as the plane ascends or descends. / At higher altitudes air pressure is lower even though the plane is pressurized. / Our ears are sealed off inside our heads as the plane ascends or descends. / So the pressure outside and inside our ears is different. / This difference in pressure can distort our ear drums, thus we will feel painful.