题目

 _______ he got the news, Mr. Mathews hurried out of his house, and ________ his car, drove all the way to town.  A. When: started                  B. The moment; having started  C. Until; starting                  D. Once; to start 答案：B一个数的绝对值一定是（　　） A、正数B、负数C、零D、零或正数