Put the Modal vebs where necessary.
1. ... you speak English? – No, I ... . 2. ... I come in? 3. The pupil ... do the exercises. 4. Mike ... run very fast. 5. If you finished your work, you ... go home. 6. I ... help my mother today. 7. Everybody ... come to college in time. 8. We ... learn the new words on English. 9. She ... not to buy bread.

His advice is quite useful. It is worth following.
Why are your clothes so dirty?
Who is to blame that this information was not sent in time?
Though the news was rather sad, he pulled himself together and continued working.
Your son is making good progress.  But I don't feel like praising him yet.
Where is the money? I've put it into your bag.
The information sent by you turned out to be quite reliable. It helped us a lot in our work.
I am looking forward to hearing/having news from you.  It is always very interesting. 

I (1. work) in a public library.I (2. have worked/have been working) here for many years and I (3. love) my job. I think I (4. am) lucky (5. to have) it. First of all, I (6. do not have to) get up early as the library (7. opens) at 10 o'clock. Secondly, it (8. is) interesting work because people aways (9. come) in and (10. ask) me (11. to help) them. This way I  (12. have already met) a lot of interesting people. Yesterday a man (13. came) to ask me about the climate in Brazil. While I (14. was looking) for this information, I (15. learnt) a lot of intersting things about that wonderful country. There is something else that makes me like my job and that is bookmarks. People (16.use) the strangest things as bookmarks. I (17. have found) a penknife, a comb, a watch, a key, lots of pens and pencils, different leaves and flowers and what not. But the other day i (18. had) a surprise of my life: I (19.opened) the book and what I (20. saw) (21. was) a huge tooth! It (22. was) used as a boomark.