Раскройте скобки, употребив время Past Simple или Present Perfect.
1. Our company just (to conclude) a new contract.
2. In the past the country (to import) textstiles and machinery.
3. The talks (not to begin) yet.
4. After the Industrial revolution the Scottish economy (to concentrate) on heavy industry.
5. When they (to sign) the agreements? – They just (to sign) it.

1   has just  concluded2  imported3 haven't begun4  concentrated5 when did they sign the agreements? They have just signed