请用括号里所给动词的适当形式填空。 1. I am looking forward to _______________ her soon. (meet) 2. He put off _______________ a decision till he had more information. (make) 3. He left the restaurant without _______________ his bill. (pay) 4. Is there any chance of _______________ his mind? (change) 5. I gave up _______________ to persuade him to continue with his studies. (try) 6. If no one helps him, he may end up _______________ a beggar. (be)