6 While I _______ (travel) to work, I _____ (get) stuck

6 While I _______ (travel) to work, I _____ (get) stuck in traffic jam.
7 I _____ (read) your e-mail when I ______ (arrive) in the evening.
8 You ______ (have to) call him tomorrow.
9 If you ____ (ask) them, they ______ (help) you.
10 I _____ (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.
14 I ____ (take) the magazine back to the library when I ____ (read) it.
15 You look tired. _______ (you/work) hard?
необходимо поставить в правильной форме.