阅读下面短文，掌握大意，然后从A、B、C、D四个选项中选出最佳选项。
On the final day of the summer camp, Ada and Lydia stood below the camp's highest, hardest rope (绳子) course. Lydia raised her hand and 1 to go first. Hands before feet, Lydia began her climb 2 the rope ladder.
"Go, Lydia, go! You're the best." Ada 3 from below. When Lydia made it all the way across, Ada smiled in relief for her friend but also felt 4 : it was her turn now.
Ada reached out her arms to the first wood rung on the rope ladder. Her arms felt shaky (颤抖的) as she felt the ladder swing a little because of her 5 . She walked her hands 6 forward to the next rung. About halfway across the ladder, Ada was starting to feel a little more confident. She could do this!
Ada 7 for the next rung, just as a strong wind made the rope ladder swing. Ada's hand did not hold the wood rung.8 , her hand hit only air and continued downward, followed by her arm, her shoulder and the rest of her body!
Almost immediately, the harness (保护带) caught her. Ada could see all the other kids staring up at 9 . As she was lowered to the ground slowly, Ada's face burned from 10 .
"Can I try again?" Ada said, holding back tears.
The coach looked at the watch. "I'm sorry, Ada. We don't have time."
On the bus home, Ada rested her head 11 the window. Beside her, Lydia sat silently and thoughtfully. "Hey, Ada?" Lydia said. "I couldn't have made it without you. I got so scared at first, 12 you encouraged me and I kept going."
"You got scared?" Ada asked.
Lydia 13 , her eyes widening. "Super scared. I'm surprised I didn't give up." Ada smiled a little. "You were just unlucky that the 14 came up," continued Lydia.
Right that moment, she knew her friend was trying to cheer her up. Suddenly falling off the ladder did not seem so 15 anymore. Anyway, she tried hard.
