Q2 - Citation needed. I was under the impression the reason it was bad was that it polluted the global namespace
Q3 - sizeof() only works in bytes, so can you really have a 7-bit struct?
Q5 - iterators are objects, aren't they?
Q10 - Question asks which is NOT a difference
Q13 - The "auto" keyword has been redefined in C++11

I stopped here. Were these the actual solutions to the problems?

根据学生错题情况展开针对性加强教育。