题目

阅读理解Weare sitting at lunch when my friend casually mentions that she and her husbandare thinking of starting a family. What she means is that herbiological clock has begun its countdown and she is considering the possibilityof motherhood.We'retaking a survey, '' she says, half jokingly. Do you think I should have ababy?Itwill change your life, '' I say carefully.Iknow, she says, No more sleeping in on Saturdays, no more relaxingvacations.Butthat is not what I mean at all I look at my friend, trying to decide what totell her.Iwant her to know what she will never learn in childbirth clas如果某一事件不发生的机会是99％，则这一事件A.必然发生B.不可能发生C.很可能发生D.不太可能发生