Use the correct tense-forms of the verbs
1.Our engineer (to be) in the office now.He (to speak) on the phone with the manager
2.When you usually(to visit) your relatives in the country?
3.Our company (to be interesed) in buying new equpment from your company/
4.Last week our representatives (to visit) the exhibition of Electronic Devices.
5.How long you (to be) London?
6.Next month our friend (to fly) for a holiday to SPain?