题目内容：

请阅读下面短文，掌握其大意，然后用方框中所给的词的适当形式填空，并将答案填写到答题卷的相应位置。每个单词限用一次。（每小题1分）

hold  walk   invent   easy   water   shoulder   free   smart  hand  if

Umbrellas are common in our life. On rainy days, many people hold them to prevent   1.  . But it’s not easy to hold an umbrella  2. there is heavy rain and strong wind. And it’s harder to make a phone call or ride a bike with an umbrella in the  3. .  An American named Alan Kaufman and his company spent six years   4.  a hand-free umbrella. At last they made it.

They called it Nubrella. Just touch a button(按钮),and the Nubrella will open 5. .With the help of its “shoulder support(支撑物)”，the umbrella can rest on the user’s   6. . So the user needn’t 7.  the umbrella any more. He can walk with hands     8.     even in the strong wind.

The hand-free umbrella is ＄59.94 each. People all around the world like it very much. Because of this 9.  invention, they can use their phones to talk and send short messages in the rain now. 10. in the rain under a Mubrella is really cool, isn’t it?