郭靖和杨康是金庸小说《射雕英雄传》中两个重要人物。你知道他们的名字与以下哪一事件有直接的联系（    ）

A

    When I was four, one day I was playing outside our house. I saw my grandfather's truck. It was black and looked better.” I got some paint and a brush which were left in the kitchen by my father. I painted the truck white and blue all over. I was finishing the job when my mum walked up and stopped me. She was worried that my grandfather would be angry. However, when my grandfather looked at my paintings on the truck, he laughed loudly. “Angela, that's the prettiest truck I've ever seen! I love it!”

    Sometimes adults (成年人) don't stop to see things through children's eyes. They missed so much beauty in the world. Luckily, my grandfather saw things in another way.

填入横线处的句子与上下文衔接最恰当的一项是（  ）
走出林间小路，豁然开朗，一潭水波不兴的浩淼湖泊依然清晰明鉴。我独自静静地欣赏难得的自然风光。这时，       ，       ，       ，       。那亮色犹如孩童嫩肤般的柔和顺畅。瞬息，夜开始拉起暮色苍茫的帷幕，湖面上有了薄薄的青雾浮现。
①东边悬挂起一轮妩媚的月亮
②晚霞也褪去原有浓重的红艳，变成了浅色的橙黄
③西边的太阳渐渐远去
④天地间的淡淡的光耀，分不清是沉落红日的余辉或是初升皓月的映照

关于x的一元二次方程x²+4x+k=0有实数解，则k的取值范围是（  ）

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