单项选择题

Tour operators report low （）rates.

A.occur
B.occupancy
C.occasion
D.occurrence

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判断题

What are the key features of a well-written analysis essay？翻译为：写得好的分析文章的主要特点是什么？

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How many major components does a proposal have and what are they？翻译为：一个提案有多少个主要组成部分，它们是什么？