题目

Nobody can go with you. We are all busy _______ ready for the coming exams.        A. get                    B. to get                       C. gets                         D. getting 答案：D18、如图，∠3是∠1和∠6的同位角，∠5是∠1和∠6的内错角，∠4是∠6的同旁内角．