Раскройте скобки, употребив время Past Simple или Past Perfect.
1. He (to return) from business trip yesterday.
2. When the boss (to enter) the office, the secretary already (to send) all the letters.
3. By 2007 New Zealand (to reach) good results in the international dairy trade.
4. Where you (to work) before you (to begin) working for our company?
5. In the past Britain’s economy (not to base) on service sector industries.