QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: Tess was knocking at the door.

QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: The kettle bubbled water.

QUES: unacceptable (OPTIONS:
- unacceptable
- acceptable)
ANS: We are knowing this theory.

QUES: acceptable (OPTIONS:
- unacceptable
- acceptable)
ANS:
Rodney was eating some squid, wasn't he?