题目

如图所示是某形体的主视图、俯视图和左视图，正确的轴测图是（） A . B . C . D . 答案：C---Mr. Yang, everything is ready for the meeting.---I’m sorry, I ___to tell you the meeting had been put off.A. should phone                           B. ought to have phonedC. need to phone                          D. should have been phoned