Bob正在介绍自己和他朋友。请你听一听,根据所听内容选择正确的一项。 ( ) 1. Bob is a ________. A. teacher B. girl C. boy ( ) 2. Bob has ________ pencil box(es). A. threeB. twoC. one ( ) 3. Bob has ________ books. A. fourB. oneC. three ( ) 4. Bob's friend is a ________. A. boyB. girlC. teacher