18. -What are the students talking about?-They a dsssing (discuss) where to go on their school trip. 相关知识点: 试题来源: 解析 答案见上are discussing 由问句可知,这里是询问现在正 在做的事情,答句用现在进行时;主语They与 discuss之间为主动关系,故填are discussing。
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