【正确答案】正确答案：The sentence " As the night fell, the wind rose" cannot be alternatively expressed as " As the wind rose, the night fell" , because the focus of the two sentences is different. The former lays its emphasis on the rising wind, and the latter lays its emphasis on the falling of the night. Therefore, we can say that at the syntactic level, language is not arbitrary.

【答案解析】解析：(考查语言在句子层面上的任意性)