甲型血友病患者缺乏的凝血因子是（）。
A.纤维蛋白原
B.凝血酶原
C.组织因子
D.稳定因子
E.Ⅷ因子
参考答案：E
—Why didn't Alice come to the party last night?
—I don't know ______. [ ]
A. why didn't she
B. why she didn't
C. why did she
D. why she did
I would gladly have paid （） for your dinner.
A. twice as much
B. two times as much
C. twice so much
D. as much as twice
