1. Not until I began to work _ how much time I had wasted.A. didnt I realize B. did I realize C. I didnt realize D. I realized2. Only by practising a few hours every day _ be able to master the language.A. you can B. can you C. you will D. will you3. If you dont go， neither _.A. shall I B. do I C. I do D. I shall4. No sooner _ to the station _ the train left.A. had I got， when B. I had got， than C. had I got， than D. did I get， when5. - Your fat
