题目内容：

阅读下文并回答问题。

There are many useful inventions in the world. Do you want to have an umbrella that makes your hands free? Alan has invented the "Nubrella", which means "new umbrella". It is the first truly hand-free umbrella in the world.

One cool thing about the Nubrella is that you don't need to hold it like a usual umbrella, you can wear it. The shoulder straps（肩带）of the Nubrella can hold the umbrella for you. The Nubrella is big enough to cover your whole head and your body. You don't need to worry about getting wet in the rain. So when walking in the rain with the Nubrella, you're able to use your cell phone or drink a cup of hot coffee.

The idea for the invention began on one rainy day. Alan was standing in his shop and found that it was hard to keep their umbrellas in the right place for the people. At that moment an idea came into his mind. He wanted to have an umbrella which could make a rainy day easy and fun.

Nowadays, Nubrella is on sale all over the world. The price of it is 59 dollars in America. You can also find it on Taobao. Would you like to have such kind of umbrella?

1.Is Nubrella only sold in America?

2.What does the word "Nubrella" mean?

3.How can Nubrella help our hands free?

4.Which one do you prefer to use, a Nubrella or a usual umbrella? Why?