1. We (thank) you for your letter of March 5-th.
2. Last week our clients (wrote) to us that they (need/needed) the machine tools urgently.
3. For some reason or other they (have stopped) the construction work for sometime, but they will resume it very soon.
4. Exhibitions and fairs (are held) every year in many countries of the world.
5. Mr. Johnson (gave) all the necessary information on the model during his visit to our office.
6. They (have been) our regular buyers of the mining equipment from Russia for the last years.
7. We (consider) your price competitive.