题目

—Mum, you promised! —Well, ______. But it was you who didn’t keep your word first. A. so was I         B. so did I          C. so I was       D. so I did 答案：D用3个“9”和3个“0”组成的六位数中，读出两个“零”的是（ ）。A.999000B.990900C.900909D.909009