题目

—We missed a chance to win a goal. —________ A. Well done!         B. Good luck!            C. What a pity!           D. How lucky! 答案：C一辆自行车的车轮半径是35厘米，车轮每分钟转100圈，要通过4396米的桥，大约需要（    ）分钟A.17B.18C.19D.20