Have you ever dreamed of flying like a bird through mountains? In 2024, the world’s longest zipline (滑索), called the K3, opened in South Africa’s Western Cape. It was built by SA Forest Adventures and Mossel Bay Zipline after six years of hard work. Now, thrill-seekers can speed through the beautiful Overberg Mountains at up to 150 km/h!

Finding the perfect place wasn’t easy. Clinton Lerm, the owner of SA Forest Adventures, spent two years looking across South Africa. He needed a place that was both safe and easy to access. One day, he saw a mountain with a road already leading to the top — it was the perfect starting point for the zipline. But before building it, his team had to study the wind and make careful plans.

To begin the adventure, you can either hike or take a 4×4 truck to the launch platform, called The Nest. After a safety briefing, you’re attached to the cable and sent flying across 3.2 kilometers. The start feels surprisingly slow, but soon you pick up speed, and the mountain views become a blur (模糊形状). As you near the end, the zipline slows down, and a staff member helps you land safely.

1.1.When did the construction of the K3 zipline probably start?

A In 2018.

B In 2024.

C In 2020.

D In 2022.

解析：选A。A 数字计算题。文章第二段提到滑索于2024年开放，且是“after six years of hard work”（经过六年的努力建成）。因此，需要从2024年向前推算6年，得出建造可能开始于2018年。故选A。

2.2. What was the main reason for choosing the mountain with a road?

A It was very beautiful.

B It was already safe.

C It was easy to reach.

D It was famous locally.

解析：选C。C 细节理解题。文章第二段明确指出，选择这座山是因为“a road already leading to the top — it was the perfect starting point”，且前文强调选址需“easy to access”（易于到达）。选项A（风景美）、B（已安全）、D（当地著名）均未在文中提及。故选C。

3.3. What is the K3 riding experience like?

A Fast all the way.

B Slow all the way.

C Slow-fast-slow.

D Fast-slow-fast.

解析：选C。C细节理解题。文章第三段直接描述了乘坐体验：“The start feels surprisingly slow, but soon you pick up speed”以及“As you near the end, the zipline slows down”（开始时很慢，但很快加速，最后快结束时又会变慢）。故选C。

4.4. Which is NOT required for riders?

A Weigh 40-120 kg.

B Be in good health.

C Avoid drinking alcohol.

D Be over 18 years old.

解析：选D。D细节理解题。文章最后一段列出了乘客要求：“weigh between 40 kg and 120 kg, be in good health, and should not be under the influence of alcohol”。文中并未提及年龄限制（如“be over 18 years old”），因此D是“NOT required”的选项。故选D。

5.5. What is the passage mainly about?

A A travel company.

B A mountain view.

C A thrilling zipline.

D A safety guideline.

解析：选C。C 主旨大意题。全文围绕K3滑索的建造背景、选址过程、乘坐体验、乘客要求和未来计划展开，核心主题是这项刺激的滑索项目。选项A（旅游公司）、B（山景）、D（安全指南）均只是文中局部细节，不足以概括全文主旨。故选C。