题目内容：

阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。

Yoghurt

It was a rough week. The price of oil skyrocketed as the temperature dropped sharply in Maine. We were looking at a high of eight degrees that week, and I had missed three days of work so my paycheck was going to be lower than normal. I was stressed, to say the least. I shopped strategically, looking for every possible way to cut pennies so I could buy groceries and keep the house warm.

My eight-year-old son didn't understand when I told him we were struggling that week. He wanted a special kind of yoghurt, but I didn't have the extra three dollars to buy it for him. It was the kind of yoghurt with a cartoon kid riding a skateboard on the front of the box, and a mere two spoonfuls in each cup. It was the kind of product that wastes a parent's money and makes me hate advertising.

I felt guilty as a parent when those big eyes looked at me with confusion, as if to say, “It's just yoghurt. What's the big deal?” So I found a way. I put something back as single mothers often do. He got his yoghurt.

On the way driving back from the grocery store, I noticed a homeless man holding a sign by the side of the road. My heart hurt, and I tried not to look at him. I watched people stay away from him on the street and walk by without even meeting his eyes. My son didn't seem to care much, either. I looked at the man closely then — bare hands grasping a piece of cardboard, snot (鼻涕) frozen to his face, a wornout jacket. And there I was struggling because I had to buy oil and groceries. But I decided to help. I pulled over to the man and handed him a five-dollar bill.

注意：1. 所续写短文的词数应为150左右；

2. 续写部分分为两段，每段的开头语已为你写好；

3. 续写完成后，请用下划线标出你所使用的关键词语。

Paragraph 1:

Seeing this, my son became confused and surprised.

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Paragraph 2:

On that day, my son performed an act that most adults wouldn’t have done.

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