题目内容

根据下列短文，回答 23～26 题。
第 23 题 Paragraph 1 _________.

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The reason why children learn their mother tongue so well lies solely in their environment of learning.

根据材料，回答 31～35 题。
第 31 题 Which of the following area has the highest average population density？

She eventually married the most persistent one of her admirers.

Customers often defer payment for as long as possible.