QUES: unacceptable
ANS: They can't stand each other, them.

QUES: acceptable
ANS: There seem to be a good feeling developing among the students.

QUES: acceptable
ANS: Who asked which statue which tourist had taken a photo of?

QUES: acceptable
ANS:
The characters in Shakespeare's Twelfth Night live in a world that has been turned upside-down.