在做这项工作前,他们有必要接受培训.
Have you ever been to the Summer Palace?
Yes. I have visited it many times 2009.
Tickets for today?
Sorry, we've got left, but we have a few for tomorrow.
Before you start writing a story, think about the (人物)and what they do.
Amy and Annie will go on a natural history walk next (星期日).
Miss Zhang (订购)a dress online two weeks ago, but it hasn't arrived yet.