Have you ever seen a horse with toes(脚趾)？Millions of years ago, horses had many toes. They had four toes on each front foot. They had three toes on each back foot. The horses were no bigger than the cats.These small horses lived in the forest. The toes helped the horses run on the soft, wet ground.
At first, it was very hot in the forest. But the weather changed. It became very cold. Many trees could not live in cold weather. The trees died and fell. Open fields took the place of forests. The sun made the ground dry and hard.
Horsed began to change, too. They began to get bigger. This took a long time. On the dry, hard land, horses needed only their middle toes for running. Their middle toes became hard. After a long time, horses had only one hard toe on each foot. Now we call this hard toe a hoof.
【小题1】How many toes did a horse have millions of years ago?

For years I wanted a garden．I’d spend hours thinking of different things I could plant that would look nice together．
But then we had Matthew, and Marvin, and the twins Alisa and Alan, and then Helen．I was too busy raising them to grow a garden．
Money was not enough．Neither was time．Often when my children were little,
one of them would want something that cost too much, and I’d have to say, “Do you see a money tree outside? Money doesn't grow on trees, you know．”
Finally, all the children got through high school and college and were off on their own．I started thinking again about a garden．
Then, one spring morning, on Mother’s Day, I was working in my kitchen．Suddenly, I looked out of the window and there was a new tree, planted right in my yard．There were things blowing around on it．       Then I put my glasses on—and I couldn’t believe what I saw．
There was a money tree in my yard!
I went outside to look．It was true! There were dollar bills(帐单), one hundred of them, hanging all over that tree．There was also a note among them, “Thank you for your time, Mom．We love you!”
Later, my children bought me tools, ornaments, a sunflower stepping stone and gardening books．A new page started in my life．
That was three years ago．My garden’s now very pretty, just like I wanted．When I go out and take care of my flowers, I don’t seem to miss my children as much as I once did．It feels like they’re right there with me．Now every year when winter comes, I look out of my window and think of the flowers I’ll see next spring in my little garden．I think about what my children did for me, and I get tears in my eyes—every time．
I’m still not sure that money grows on trees．But I know love does!
【小题1】How many children did the writer have?