He has changed so much that you may well not ______ him.
The magician picked several persons from the audience and asked them to help him with the performance.
The open university was started in order to help those who _____ having a university education when they were young.
Jack almost fell off the cliff, but managed to _____ until help came.
It isn't so much whether he works hard; the question is whether he works _____.
Alice was very sorry to hear that her grandmother had _____ two days before.