Question

【题目】The of your talk must be at least 10 minutes. (long)

Answer 1

【答案】length
【解析】句意：你讲话的长度必须至少10分钟。long长的，是一个形容词。空前有冠词the，后面有介词of，因此这里用名词，length长度，名词。故填length。