Answer:
28) He’s worked for that company since last June.
29) “Have you been to Russia.” - “Yes, I have .” A) Had / be / haven’t C) Have / be / have
30) Have you done your homework?
31) I haven’t done it yet.
32) What are you going to wear this evening?
33) I am not going to drink/I won't drink because it is too sweet. (it could be either)
34) I’ve seen the latest Star Wars film. I saw it last week.
35) She’s written the letter. She wrote it yesterday