如图是某探究小组在某山地观测到的气温结果示意图，读图回答问题

阅读下面短文, 掌握大意, 然后从每题所给的A、B、C、D四个选项中选出最佳选项.

    Andy woke up and looked at the clock 11: 30? He jumped out of bed and threw on clothes. He had wanted to get up early and surprise his dad with Father's Day breakfast in bed﹣with his mom's help of course. He took up the wrapped present on his desk and went to find his 1.

    "Where is Dad?" Andy checked all the rooms, but the whole house was empty. He walked out to the 2, and his jaw dropped. Dad was holding a hammer and looking at a new tree fort that stood in 3 big back yard.

    Andy climbed the rope ladder up to the fort. It had two rooms with three small windows.

    Dad followed Andy into the fort, looking excited. "I spent all morning 4 it. I had one when I was your age. Grandpa surprised me with it on Father's Day, too. "

    "So, it's like a（n） 5?" Andy asked.

    "Yes, this is a present for 6 of us. Maybe you'll build one for your son one day. "

    Dad looked around and asked Andy 7 they would do first in the tree fort. Andy slowly showed the 8 and said, "Happy Father's Day!" He didn't think it was possible, 9 Dad's smile widened as he opened the gift. "A chess set! How did you know I wanted 10?" Andy always saw his dad playing against the computer and he guessed it 11 be his father's favorite.

    "Let's play it!" Dad set up the chessboard. "It's the 12 gift I got of all this Father's Day. "

"I'm glad you like it." Andy said.

    "I do, but I was talking about spending more time with you. I 13 loved the father﹣son time. I spent a lot with your grandfather when I was 14. "

    Andy looked at his dad. "Can we call Grandpa and 15 him to come to the fort?"

Dad squeezed Andy's shoulder. "I think he'd love that."

    That day, the three men played, talked and laughed. It was really a happy Father's Day.

    I am Alice. My sister and I spent our last summer holidays with our uncle who is a geologist (地质学家) and loves to collect stones.

    One day he bought us two backpacks and asked us to go to the mountain with him. We walked the whole day. Every now and then he put stones in our backpacks. To our surprise, he also took some stones out from them. But we thought he had just found better stones.

    When we returned to the house, we were very tired. The backpacks were so heavy that we felt relief （轻松）when we took them off. Yet our uncle's backpack was half empty.

    "Why did you give us so many stones?” we asked.

    "I didn't. You did." he said. “You didn't know it, but I gave you a little attitude(态度) test today. I listened to every word you said. Whenever you were complaining (抱怨) , I added a stone to your backpacks. whenever you talked about something with positive (积极的) thinking, I took out a stone. And now look at your backpacks."

    Our backpacks were full of stones.

    “Your negative( 消极的) thoughts are just like stones. You carry them in your mind just like those stones in your backpacks. The mote negative thoughts you have, the heavier your mind will be.” said our uncle.

    With great love, our uncle taught us one of the most important lessons it life—the power of the attitude.