题目

 We tried to find a table for seven, but they were all__________.        A. given away               B. kept away                C. taken up            D. used up 答案：C一个人要想在最短时间内跨越所有的经线，他应选择的地点是：A.0°纬线上B.0°经线上C.南极点D.南回归线上