【简答题】There have been ten thousand visitors to the
exhibition since _______A. its opening B. it's opening C. it opens D. one month
【单选题】During the past ten years there have been dramatic changes in the international situation
【单选题】There have been ten thousand visitors to the exhibition since______.
【单选题】There have been ten thousand visitors to the exhibition since _______
【单选题】下列哪项是临床上检查疟原虫最常用的方法( )