Study this chart, which shows staff numbers in an Austrian engineering comany, and complete the extract below from the report by putting the verbs in brackets into the correct tenses. Two years ago, Trolteknik [填空1] (employ)230 members of staff, most of whom [填空2] (work) on large-scale state-funded projects in western Austria. However, last year the government [填空3] (decide) to reduce its budget, so the company [填空4] (have) to temporarily lay off 40 employees. Fortunately, this year the company [填空5] (sign) contracts to equip two large factories in the region, with the result that it [填空6] (be) necessary to take on 50 extra staff.