Lucy is a college student who is hard-working, so she passed the College English Test Band 4 at her first__________.

A．attempt

B．effort

C．struggle

D．factor

金钱白花蛇的特征是

A．背部银灰色，有绿色斑点

B．背部黑色或黑棕色，有多条白色环纹

C．背部高耸成屋脊状，俗称“剑脊”

D．背部黑色，有红色环纹

E．背部有24个灰白色菱方形斑纹