单选题 All of the students did not turn up at the party. The meaning of the sentence is:
A. Some of the students turned up. B. None of the students turned up.
C. All of the students turned up. D. All of the students possibly turned up.

【正确答案】 A

【答案解析】该题是语法结构题，考查不定代词all与否定助动词not连用的意义。不定代词all与否定助动词not连用表示部分否定。该句的意思等于Not all the students turned up at the party. 选项B表示全部否定。因此，根据题意和语法规则，选项A是最佳答案。