Раскройте
скобки и поставьте сказуемые в Past Simple.
Переведите.
But when I (to arrive) there no one in the
office
Раскройте скобки и выберите нужную форму:
Past Simple или Past Perfect. Переведите.
The
economist (to work) in our department for ten years.
That
contract that you (to sign) (to be) profitable for our company.