— What _______ if you _______ on the Titanic? 　　

— What a question! 　　[ ]

A. would you do; were　　　　　　　　　　

B. did you do; were 　　

C. had you done; would have been　　　　　

D. would you have done; had been

—Excuse me, look at the sign “No parking”.

—Sorry, I ________ it.

A．don’t see

B．haven’t seen

C．didn’t see

D．won’t see