My English

1) I (will not come / am not coming) to the plant tomorrow.
2) I think Tina is going on a business trip to Italy next week.
3) Do you have talks {I guess you mean: a speech} the day after tomorrow?
4) Maybe, I will be at home next Sunday.39
5) The representatives of Simpson and Co. don't arrive tonight.
6) Do you think you will sign the contract next Friday?
7) Who is leaving for London this afternoon?
8) When are you meeting Mr. Bell?
9) He doesn't work today.
10) I am sure their manager will come to our office tomorrow.

Good.. But ou need a little work on the verb 'to be' and the auxillary verbs.

Good luck :)