A group of brave tourists became the first visitors to cross a new 590 foot high glass-bottomed suspension bridge(吊桥) in China. This special structure, the first of its kind in the world, is situated in the province of Hunan. Images have shown online showing the visitors gripped with fear and frozen in awe while standing on the see-through walkway. One female tourist is seen holding the handrail tightly and had to be dragged along by her friend. 

The bridge had previously been a wooden one that linked two peaks of Stone Buddha Mountain in Shiniuzhai Geopark but is now a 984 foot long glass walkway.  Part of the bridge had already been replaced with glass in 2014, attracting groups of fearless tourists. However, 11 engineers have been working on the bridge over the last few months to replace all the wooden parts with glass, transforming the bridge into the world’s first glass-bottomed suspension bridge. 

According to reports, several visitors were so terrified that they could barely move. Some were seen holding on to each other as well as to the railings as they made the crossing. Many people were filled with fear as they tried not to look down to the steep drop below. The bridge was said to move from side to side slightly when people walked across it, making people feel even more frightened. However, as part of the scenic site, it also offered incredible views over the geopark and the landscape below. The amazing construction has already been named “hero bridge” because of the amount of courage required to cross it. 

Those worried about the safety of the bridge can rest easy. The glass forming the footpath are said to be 25 times stronger than regular window glass. They’re also created to stay in shape and withstand impact although special footwear has been issued to visitors. 

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1.The underlined word “gripped” in the first paragraph means ______.

A stood

B crossed

C walked

D held

解析：选D。词义猜测题。从第一段最后一句的One female tourist is seen holding the handrail tightly可以得知游客会因害怕而“紧握扶手”，故选D。

2.What is the main idea of Paragraph 2?

A The history of the glass bridge.

B The reason why the bridge was built.

C The safety of the glass bridge.

D The wooden bridge should be changed.

解析：选A。主旨大意题。文章第二段讲述了该桥原来是一座木桥，然后改建成了玻璃桥，因此该段就是讲述这个桥的历史，故选A。

3.What made traveling through the bridge more fearful?

A The wooden parts with glass.

B The way people walk on it.

C The shaking of the bridge.

D The great landscape below.

解析：选C。细节理解题。根据第三段第四句的The bridge was said to move from side to side slightly when people walked across it, making people feel even more frightened可以得知是桥的具体晃动让人更加恐惧，故选C。

4.Why is the bridge called “hero bridge”?

A Because only courageous people can cross it.

B Because the bridge was built by brave people.

C Because the bridge doesn’t have the railings.

D Because people are full of courage when on it.

解析：选A。细节理解题。根据第三段最后一句的...because of the amount of courage required to cross it可知是要勇气才敢过这个桥，故选A。

5.What measure did people take to make the bridge safe?

A They used regular window glass.

B They created strong glass in shape.

C They gave glass special footwear.

D They made construction special.

解析：选B。细节理解题。根据文章最后一段第三句的They’re also created to stay in shape and withstand impact可知这些玻璃是能耐冲击的特种玻璃，因此桥的安全的靠玻璃来保证的，故选B。