1. she / not *know / which / buy (Simple Present)
2. he / *wish / find out / how / get / there (Simple Past)
3. I / not *understand / how / get / there (Simple Present)
4. you / *must decide / wheither / join / party (Simple Present)
5. I / *wonder / when / brgin / project (Simple Present)
6. he / *notice / which shortcut / take / (Simple Past)
7. she / now *explain / how / calculate / sum (Present Continuous)
8. they / not *remember / when / come again (Simple Past)
9. she / *wonder / what / say / next (Past Continuous)
10. please / *see / which step / take / first (Request)
11. please / *tell / children / what / do / next (Request) 12. you / *advise / me / which / buy / ? (Simple Future) 13. he / *show / us / how / get / ferry pier (Simple Past)
14. this note / *remlnd / you / where / go (Simple Future) 15. she / *teach / students / how / solve / problem (Simple Past) 16. please / *instruct / new-comers / how / do / their work (Request)
17. you / *notify / secretary / where / meet / me / ? (Simple Future) 18. she / *ask / her boss / whether / go ahead / project (Simple Past) 19. you / *must tell / him / when / pay back / debt (Simple Present)
20. I / just *inform / applicants / what / do / tomorrow (Present Perfect) 21. it / *be / important / be / punctual (Simple Present) 22. it / *look / difficult / persuade / him (Simple Past)
23. it / *be / shame / deceive / old man (Simple Past) 24. it / *seem / umlikely / that / project / succeed (Simple Present) 25. now / it / *appear / impossible / find / missing child (Simple Present) 26. it / *prove / vital / that / you / support / scheme (Simple Future)
27. it / *be / no use / talk / him (Simple Present) 28. it / *be / pity / that / you / cannot attend / my wedding / last week (Simple Past) 29. it / *get / more / more / difficult / raise / money / now (Simple Continuous) 30. it / *be / pleasure / accept / your invitation (Simple Future)
31. I / *believe / it / hard / persuade / father (Simple Present) 32. she / *find / it / necessary / take / legal action (Simple Past) 33. I / *think / it / important / tell / truth (Simple Present) 34. he / not *expect / it / so dangerous / do business / criminals (Simple Past)
35. many people / *discover / it / almost impossible / save / money (Present Perfuct) 36. we / *consider / it / unlikely / complete / project / before / deadline (Simple Past) 37. after retirement / he / *find / it / hard / occupy / time (Simple Past)
38. we / *think / it / unnecessary / tell / him / details (Simple Past) 39. dinosaurs / *find / it / impossible / adapt / new environment (Simple Past) 40. many students / not *expect / it / so competitive / enter / university (Simple Past)
41. there / *be / children / play tennis / down there (Simple Present) 42. there / *be / many people / queue up / for tickets / cinema (Simple Past) 43. there / *be / woman / sell / vegetables / over there (Simple Present)
44. there / *be / tow old men / argue / each other / next room (Simple Past) 45. there / *be / repairman / come / in ten minutes (Simple Future) 46. there / *be / old farmer / grow / fruit / this land (Simple Past)
47. there / *be / two policemen / run / up to us (Simple Present) 48. there / *be / many young people / ask / for help (Present Perfect) 49. there / *be / over six million people / live / Hong Kong (Simple Present) 50. Listen! / there / *be / strange noise / come / upstairs (Simple Present)