[Q]: Would the following sentence, by the strictest standards, be considered correct? What did you put in your box?
++++++++++
[A]: acceptable

[Q]: Would the following sentence, by the strictest standards, be considered correct? John knows that she left and whether she will come back.
++++++++++
[A]: acceptable

[Q]: Would the following sentence, by the strictest standards, be considered correct? John was wondering whether to leave.
++++++++++
[A]:
acceptable