题目内容
2．We will celebrate the 90th birthday of the Chinese Communist Party _____ July 1st，2011．（ ）| A． | on | B． | at | C． | in | D． | during |
分析 我们将在2011年7月1日庆祝中国共产党第九十岁生日．
解答 答案：A 根据其后的"July 1st，2011"，可知表示的是2011年7月1日，具体到了某一天．on+具体某一天；at+时间点；in+月、年、季节等；during表示在…期间．
点评 本题考察时间介词的辨析．弄清后面所跟内容是年份、月份、季节、时间点、时间段还是具体某一天，是做题的关键．
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