QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: John told us which book we should review.

QUES: unacceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: I ordered there to be three books on the subject.

QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: The sofa was longer than the desk was.

QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS:
Every student who handed in some homework will get a prize.