1.I haven't seen my sister since 2006.                                                                                                   >I last                                                                                                                                                     2. He is too young to go to school alone. > He is 3. We spent two hours getting to London. → It took 4. If you don't try hard, you will not pass your final exam. → Unless 5. "Let's go to the cinema. ", Lien said. > Lien suggested 6. The poor farmer was tired but he kept working. > In spite 7. Has someone booked the seats yet? → Have 8. Is it really necessary for us to arrive so early? > Do we really, 9. He has never played a computer game before. → This is 10. Everyone heard about the accident before I did. .>I was the