Привет мой друг.Обращались ли вы чтоб отменить заказ?
Подожди кажется смогу ответить...Но не обещаю...
<span>1. He ( returned) from business trip yesterday.
2. When the boss ( entered) the office, the secretary had already (sent) all the letters.
3. By 2007 New Zealand (had reached) good results in the international dairy trade.</span>
The answers of the exercises a and b