The conference gives a chance for people of different ________ to exchange．So you should ________ your time to attend it．I shall not listen to any excuse．
A.characters; wasteB.attitudes; keepC.views; spareD.ways; save在线课程C
解析：
view观点，看法．句意为“会议给那些有不同观点的人以交流的机会，所以你应该留出时间来参加．”spare余出，留出．