---It is around 100 years, known to us all, ______ the first modern Olympic Games was held.---It really is. But were ______ ?A.that; was thatB.since; was itC.after; is thatD.when; is it
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B解析考查句型It +be +some time +since从句，表示“自从……以来已经多长时间了。”本句意思为：众所周知，自从第一届现代奥林匹克运动会举办以来大约一百年了。既然是一百年前举办的，第二句当然要用一般过去时——是在哪儿举办的？比较：It is around 100years ago that the first modern Olympic Games was held. w