4．23．We had a trip tothe Science Museumlast Saturday．
24．All the students inGrade 9joined in the trip．
25．First of all，our teachers told us a lot aboutsafety．
26．It took usabout two hoursto get there．
27．In the museum we talked withsome robots．
分析 略
解答 23．the Science Museum 24．Grade 9 25．safety 26．about two hours 27．some robots
點評 略
