Complete the passage with the proper words in the box. Each word can only be used once. One word is not needed. A. number     B. enables    C. creative    D. immediate      AB. afford AC. application   AD. resources   BC. visual   BD. experiened   CD. image VR is an emerging technology that has demonstrated potential as an effective teaching tool. Researchers at the University of Washington have been at the forefront of exploring the 1 of VR to education. In 1995, for example, almost 3,000 students in grades four to twelve 2 VR in the classroom, and another 365 built their own virtual environments (VEs). Make no mistake, virtual reality is on its way into our public schools. The 3 of articles about VR in educational journals is increasing by leaps and bounds. Workshops and symposia on VR at local and national education conferences are becoming commonplace. At the same time, the cost of what were once expensive VR workstations is coming down to the point where schools can begin to 4 them. Virtual Reality allows us to learn through experiencing places we are not able to visit in the real world. It 5 us to move things that are too heavy, too light or too expensive to move in the real world. Virtual Reality also lets us visit places at different time periods that we could not experience in one lifetime. For example, we could build a VE that allows us to visit our earth today and then travel back in time and visit it 100 million years ago. Virtual Reality allows us to experience a body of knowledge interactively. This is a major distinction from other 6 technologies: film, television, and photography. Students learn while they are situated in the context where what they learn is to be applied. They get 7 feedback(反馈) as they explore their understanding of the material. Of course, Virtual Reality is also a place for 8 expression. We can create a world that does not exist. We can build things without consuming natural 9 . We can create art. We can see music. We can express our imagination. We can generate and communicate our ideas visually.