QUES: unacceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: We investigated bombs in the area.

QUES: unacceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: I know which book Max read, and which book Oscar hasn't done so.

QUES: unacceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: John left at 11 and at 12, Bill.

QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS:
She has enough problems as it is.