阅读下面材料，在空白处填入适当的内容（1 个单词）或括号内单词的正确形式。

This is a real story of a team of high school inventors. One team member noticed that his town didn’t have ramps (斜坡) between streets and pavements.【小题1】troubled him because his sister relied on【小题2】 wheelchair for movement. Without ramps, she had difficulty 【小题3】 (get) around. The old part of town was【小题4】 (especial) difficult for her.

The invention team decided【小题5】 (build) an attachment(附加装置) for wheelchairs. The work was difficult and challenging, 【小题6】 the students had two teachers who helped them. First, the team 【小题7】 (member) researched how wheelchairs operated. They built a small model of their idea. Then they【小题8】 (construct) a full-size model. The wheelchair has attachments on both sides. Each attachment includes a ramp that extends from a telescoping(伸缩) arm. This 【小题9】 (use) and unique attachment received a US patent (专利) in 2010. To learn more【小题10】 the wheelchair attachment, search for the patent number 7,850,189 on the Internet.