第24题: [单项选择]David is a nice guy who used to be a co-worker Of ______ when I was living and working in the Middle East about five years ago. A. I B. me C. myself D. mine 参考答案:D 答案解析:[理由] 1)不定冠词(a/an)或数词(some、many、few、several、most…)可与名词性物主代词(yours、mine、his、hers、theirs…)连用: 不定冠词