题目

—It’s a little hot and humid today. Would you mind _____ the window? —Of course not. A. opening                  B. to open                  C. open 答案：A。考查固定句式。Would you mind doing sth. ? (你介意做某事吗？), 故选A。某正整数被63除商为31，余数为42，那么这个正整数所有质因数的和是多少？