题目

— It is around 100 years, known to us all, ______ the first modern Olympic Games was held. — It really is. But were _____ ? A. that; was that      B. since; was it      C. after; is that    D. when; is it 答案：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.四大牧区中跨经度最广的是（　　）A．新疆牧区B．西藏牧区C．青海牧区D．内蒙古牧区