Mike: Dad, winter just started here in Hangzhou, but it's summer in Auckland. Why do different parts of the world have different seasons?
Dad: (1)
d
Our earth is divided into the northern half and the southern half. (2)
b
Mike: But why?
Dad: It's because of how the earth moves. (3)
a
It turns around an imaginary pole in its centre.
Mike: I know that much.
Dad: But did you know that this imaginary pole isn't straight up and down? (4)
f
Right now, the southern half of the planet is leaning towards the sun. (5)
e
That's why it's summer there. Up here, the northern half is leaning away from the sun. We don't get as much direct sunlight, so it's colder here.
Mike: Yes, that's true. It's snowy too! So … when the northern half starts leaning towards the sun, we will have summer?
Dad: Exactly!
Mike: (6)
c
Thanks for explaining this to me, Dad.
Dad: No problem, Mike.
答案：【解析】：
這是一道英語語法和句子結構填空的題目，同時要求寫出句子主干結構。題目給出了一個對話，對話中父親向Mike解釋了為什么世界上不同地方有不同的季節(jié)。對話中有6個空白處需要填寫，同時需要分析所填句子的主要結構。
1. 對于第一個空白處，需要填入一個引導解釋或回答問題的句子。選項d "That's a great question." 是一個常用的回答，表示對問題的贊賞，并引出接下來的解釋。
2. 第二個空白處需要描述地球被分為兩半的情況。選項b "Both halves always have different seasons." 直接說明了地球兩半的不同季節(jié)，與Mike的問題相呼應。
3. 第三個空白處需要描述地球的運動方式。選項a "The earth turns once every day." 準確地描述了地球每天自轉一次的事實。
4. 第四個空白處需要解釋地球自轉軸傾斜的原因。選項f "It leans a little." 直接說明了地球自轉軸是傾斜的。
5. 第五個空白處需要描述地球南半球傾向太陽時的季節(jié)情況。選項e "It gets more direct sunlight." 解釋了為什么南半球是夏天，因為它得到了更多的直射陽光。
6. 第六個空白處是Mike對父親解釋的回應。選項c "Our planet is so interesting." 表達了Mike對地球現(xiàn)象的興趣和好奇。
主干結構分析：
1. "That's a great question." 主干為 "That's a question."
2. "Both halves always have different seasons." 主干為 "Both halves have seasons."
3. "The earth turns once every day." 主干為 "The earth turns."
4. "It leans a little." 主干為 "It leans."
5. "It gets more direct sunlight." 主干為 "It gets sunlight."
6. "Our planet is so interesting." 主干為 "Our planet is interesting."
【答案】：
1. d That's a great question. (主干: That's a question.)
2. b Both halves always have different seasons. (主干: Both halves have seasons.)
3. a The earth turns once every day. (主干: The earth turns.)
4. f It leans a little. (主干: It leans.)
5. e It gets more direct sunlight. (主干: It gets sunlight.)
6. c Our planet is so interesting. (主干: Our planet is interesting.)
B When you think about the different seasons, what sounds come to mind? Write an essay about the sounds of the seasons.The Sounds of Seasons
Each season has its special charm, and for me, the sounds of each season are like beautiful music that I never get tired of listening to.
Spring brings the sound of life waking up. I love the sound of raindrops tapping on the window, like a gentle drumbeat. Birds start singing happily in the trees, and sometimes I can hear the bees buzzing around the flowers in my garden. It makes me feel that everything is full of hope.
Summer is a lively season with exciting sounds. In the afternoon, the cicadas sing loudly in the trees, which is the most special sound of summer. At night, I often hear the frogs croaking by the pond near my home, and crickets chirping in the grass. It's like a big outdoor concert.
Autumn has some soft and nice sounds. The wind blows through the trees, and I can hear the leaves rustling and falling to the ground, making a "shush" sound. Sometimes, geese fly south in a V-shape, honking loudly as if they are saying goodbye to us.
Winter is a quiet season but has lovely sounds too. When it snows, everything is silent, but I enjoy the sound of walking on the snow, which is "crunch, crunch". At home, the sound of the fire crackling in the fireplace and people laughing while drinking hot chocolate makes me feel warm and happy.
I really love all the sounds of the seasons. They make my life more colorful and interesting, and I always look forward to hearing them every year.
答案：The Sounds of Seasons
Each season has its special charm, and for me, the sounds of each season are like beautiful music that I never get tired of listening to.
Spring brings the sound of life waking up. I love the sound of raindrops tapping on the window, like a gentle drumbeat. Birds start singing happily in the trees, and sometimes I can hear the bees buzzing around the flowers in my garden. It makes me feel that everything is full of hope.
Summer is a lively season with exciting sounds. In the afternoon, the cicadas sing loudly in the trees, which is the most special sound of summer. At night, I often hear the frogs croaking by the pond near my home, and crickets chirping in the grass. It's like a big outdoor concert.
Autumn has some soft and nice sounds. The wind blows through the trees, and I can hear the leaves rustling and falling to the ground, making a "shush" sound. Sometimes, geese fly south in a V-shape, honking loudly as if they are saying goodbye to us.
Winter is a quiet season but has lovely sounds too. When it snows, everything is silent, but I enjoy the sound of walking on the snow, which is "crunch, crunch". At home, the sound of the fire crackling in the fireplace and people laughing while drinking hot chocolate makes me feel warm and happy.
I really love all the sounds of the seasons. They make my life more colorful and interesting, and I always look forward to hearing them every year.
