1 . —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

3 . — Tim, shall we attend the lecture about food safety?
— ________? It is closely related to our health.

A．How come

B．What for

C．Why not

D．So what