Insert "what" or "which"

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Nobody knows  she is up to.
They know
 is good for them.
They know the place,
 makes things easier for them.
He never likes
 he has been offered.
He never says hello,
 his grand-mother resents.