阅读下面短文,从每题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。
I became the youngest person in the world to climb Broad Peak in 2018. Then I set my1on Mount Qomolangma.
Even highly2mountaineers face barriers like extreme altitude, avalanches (雪崩), and freezing temperatures. Still, I was3.
I turned 19 on March 11, 2021. On the 24th day of the month, I landed in Nepal to summit (登顶) Mount Qomolangma—the4point on Earth at 8,848.86 meters. I spent close to two months at Base Camp and took shorter hikes up the mountain to5the conditions and the low-oxygen environment.
Base Camp sits at an elevation of 5,364 meters, tall enough to cause6emergencies. The route is mostly a long, slow, technically7, oxygen-starved journey. I was nervous at first, but I didn't rush as I moved around layers of8shifting, huge ice blocks.
I witnessed fellow climbers9and heard some screaming for help at the top of their lungs. Sometimes, I stopped dead in my10. I gasped for air, but I had no choice but to keep11.
I was in Qomolangma's Death Zone for 24 hours. Oxygen is so12in the Death Zone and the body's cells begin to die. Hikers have to13oxygen tanks. Most deaths from climbing Qomolangma14in the Death Zone.
On May 11, 2021, I became the fourth teenager in the world to climb Mount Qomolangma. I was on top of the world, literally! I felt like I could15the sky.