题目内容：

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项为多余选项。

A fear of heights is a common feeling that is easy to understand. According to many psychologists, a fear of heights is one of the only two natural fears --- the other is the fear of loud noises.  1.  If you are not afraid, you could walk too close to the edge and fall off. Having a fear of heights is good because it protects us from real danger.

2.   They experience an intense fear even inside a safe environment such as a skyscraper, which is not an appropriate response and it is not helpful. 3. “As long as I can remember, I have had a powerful fear of heights. It can completely ruin a vacation. For example, when I was with friends in Paris, I became terrified while going up to the Eiffel Tower. I was almost crying and I felt embarrassed for the rest of the vacation,” Adams said.

Fortunately, having an irrational(不合理的) fear of heights can be corrected. 4.  The most effective way seems to be getting the people to acknowledge their fears, for example, by encouraging them to go to the top of tall buildings, hike up steep mountains, or stand on a high bridge.

5. When faced with a threatening situation, taking slow, deep breaths can help slow the heart rate and increase the oxygen flowing to muscles to keep from tensing up. If possible, a few minutes of meditation(冥想) may be effective in relieving some tension.

It is important to remember that an inappropriate fear of heights is not unusual and can be treated.

A. Another way to overcome a fear of heights is to learn to control the physical symptoms.

B. However, some people have an irrational (非理性的) and unhealthy fear of heights.

C. One way to defeat your fear of heights is to do an activity that involves nothing but heights.

D. There are a number of ways this can be achieved.

E. John Adams, an English teacher, has an irrational fear of heights that makes his life very difficult.

F. If you are on the edge of a cliff, it is useful to be a little afraid.

G. Nearly everyone experiences some degree of anxiety when exposed to heights.