Complete the sentences with back, on (upon), out, (up) for. 1. Alex hit ____________ a radical solution to his problem. 2. I’m sure he’ll hit you ____________ for the money he needs. 3. Mrs. Stones hit ____________ at the committee’s decision. 4. Don’t mess with him: if you hit him, he’s sure to hit you ____________. 5. The President hit ____________ his rival by accusing him of double standards. 6. He screamed and hit ____________ at his opponent.