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4. Put the verb into the right form.
1 We sometimes ____ (have to) work at night last month.
2 When you are applying for a job you _____ (should/look through) a lot of advertisements.
3 What _____ yesterday? (you/do)
4 ______ (you/hear) about Bob? – No, I haven’t. Where is he?
5 _______ (you/have to) work at weekends?
6 While I _______ (travel) to work, I got stuck in traffic jam.
7 The lecture was writing on the board when I ______ (enter) the classroom.
8 You ______ (have to) call him tomorrow.
9 If you ask them, they ______ (help) you.
10 I would go to Los-Angeles, if I _______ (get) a visa.
11 If I ___ (be) you I _____ (go to) the interview.
12 When I _____ (arrive) at work yesterday, my boss _____ (speak) to someone on the phone.
13 Steve ____ (work) for the same company for five years and now he wants to change his career.
14 I gave the magazine back to the library when I ____ (read) it.
15 You look tired. _______ (you/work) hard?

1. Had to2. Should look trough3. Did you do4. Have you heard5. Do you have to6. Was traveling 7. Entered8. Will have to 9. Will help10. Get11. I were you, would go12. Arrived, was speaking13. Had been working14. Read 15. Did you work