【单选题】-Have you seen the film Lost in Thailand? -Oh, no. I ___ my homework all day yesterday.
【单选题】— When did you finish _____ your homework? — I finished it at 9:00 last night. [ ]
【多选题】网络传输介质是指在网络中传输信息的载体,常见的传输介质分为( )和( )两大类
【单选题】The students _____ their homework when the teacher came into the classroom. [ ]