unit one,band3 作业文件:内容:IICVBDirections: Choose the best answer to complete each of the following sentences.1. Do you notice that a retarded child often shows a/an _ look? A. hollow B. empty C. bare D. vacant 2. In many major cities there are more _ apartments than there are homeless people.A. blank B. empty C. vacant D. bare3. It is interesting that many animals can _ their ears and noses. But its not easy for human beings to do so. A. tr
