题型：问答题 完形填空。Zip: How 1 your weekend? Zoom: It was a busy one. Zip: What did you 2 on Saturday morning? Zoom: I washed my clothes. I went 3 a park. Zip: What did you do on Saturday? Zoom: I 4 my homework. I went 5 .( ) 1. A. was ( ) 2. A. did ( ) 3. A. to ( ) 4. A. doing ( ) 5. A. fishes B. were B. does B. in B. do B. fish C. is C. do C. on C. did C. fishing 查看答案
题型：问答题 下列关于声音的产生和传播的说法中，正确的是[ ]A．声音都是靠空气来传播的 B．只要物体振动，就能听到声音 C．回声是声音被障碍物反射而形成的 D．声音的传播速度不受周围环境温度的影响 查看答案