Workers started to build the longest footbridge (人行桥) in May 2018. They finished it in April 2021. It was opened to the public in May. It cost 2.8 million dollars.

The footbridge is in northern Portugal. It is 175 meters above the River Paiva. It is in beautiful nature. There are many waterfalls and green hills. The footbridge is 516 meters long. 100 people can be on the bridge in one moment. The first visitors walked across the bridge. They were afraid at first. Then they enjoyed the walk.

The bridge has a transparent bottom. Transparent means that people can see through it. The bridge will not be fit for you if you are afraid of heights. When people walk on the bridge, they can feel that it is moving.

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1.When did workers start to build the footbridge?

A 2 years ago.

B 3 years ago.

C 4 years ago.

D 5 years ago.

解析：选B。B细节理解题。根据第一段Workers started to build the longest footbridge (人行桥) in May 2018.可知，工人们在2018年5月开始建造最长的人行桥，即（2021-2018=）3年前。故选B。

2.Which is not mentioned about the footbridge?

A The surroundings.

B The length.

C The location.

D The weight.

解析：选D。D细节理解题。根据全文可知，该人行桥位于葡萄牙北部，长516米，周围有许多瀑布和青山，未提及重量，故选D。

3.Which of the following about the footbridge is TRUE?

A It is the first footbridge in Portugal.

B It is always moving with people on it.

C Most of the people will feel afraid on it.

D 100 workers worked together to build it.

解析：选B。B推理判断题。根据最后一句When people walk on the bridge, they can feel that it is moving.可知，当人们在桥上行走时，他们能感觉到桥在动，推断桥上有人在行走的话，桥会动。故选B。

4.The underlined word “transparent” in Paragraph 3 means _______ in Chinese.

A 厚实的

B 透明的

C 光滑的

D 纤薄的

解析：选B。B词义猜测题。根据最后一段Transparent means that people can see through it.可知，人们可以透过它看到下面，由此猜测transparent意为“透明的”。故选B。