听音,选择正确的答案。 1. My book is __________. 2. His __________ is on his desk. 3. The boy is __________ the girl. 4. I have __________ pencils. 5. I am playing games with my __________. A. red A. eraser A. behind A. 15 A. sister B. black B. pencil B. beside B. 20 B. brother C. blue C. ruler C. in front of C. 25 C. friend