Which of the following contains an error in verb voice?

Had I known you would be upset, I would have postponed the trip.

If she was a more active person, she would feel better.

I had hoped we would be further along than this by now.

If I were better in math, I would have done better in chemistry class.

Question

Which of the following contains an error in verb voice?

 Had I known you would be upset, I would have postponed the trip.

 If she was a more active person, she would feel better.

 I had hoped we would be further along than this by now.

 If I were better in math, I would have done better in chemistry class.

lovelyanna · Answer

I think A.

anonymous · Answer

What is verb voice in the first place

lovelyanna · Answer

Had I known you would be upset doesn't make sense.
It should be something like this: 
"If I had known you would be upset, I would have postponed the trip."

anonymous · Answer

Okay thank you very much!

lovelyanna · Answer

I don't know how to explain. This might help you. http://www.englishclub.com/grammar/verbs-voice.htm http://en.wikipedia.org/wiki/Voice_(grammar)

lovelyanna · Answer

You're welcome :)