— Tom, what a pity! I almost succeeded yesterday.

—_______. I told you to be careful before.

A．One false step will make a great difference

B．Where there’s life, there’s hope

C．Never put off till tomorrow what you can do today

D．One tree does not make a forest

五四运动爆发的导火线是（）

A.巴黎和会中国外交失败

B.俄国十月革命的影响

C.袁世凯称帝

D.五卅惨案的发生