情态动词测试

Q1:She____fifty or so when I first met her at a conference.

Q2:-Whats the name?-Khulaifi.____I spell that for you?

Q3:以下哪些情况要用（should）do

Q4:本不应该做某事用“neednt have done”

Q5:从推测的角度，按可能性从大到小写出常用情态动词。