完成对话（一篇，每格一词1分，满分7分。）
Lily: Excuse me. __________ the time, please? David: Sorry, I don’t __________. My ___________ is lost(丢失的). Lily: Hi, Jim. What time is it now? Jim: Let ________ see. __________ about half __________ eight. 
Lily: Thanks very much. It’s time _________ class. Goodbye!