John said, “Why don't you ask the teacher to explain the question again, Mary?” -> John asked Mary ………………………………………………………………..……..……………….. 3. He is a more persuasive speaker than his brother -> He ………………………………………………………………..……………………………….. 4. The last time I went skiing was when I was in Switzerland. -> I haven’t …………………………………………………………..……………………………….. 5. Because of a shortage of water, many trees died rapidly. ->Because …………………………………………………………..……………………………….. 6. Keep silent or you will wake the baby up. -> Unless………………………………………..……………………………………………………..