1. Customs tariff (was worked out) in 1795 but it ( came) into effect only in 1800.
2. After the New Trade Statute (had been signed), customs procedures (were established).
3. Before he (was appointed) Head of St.Petersburg Customs House, A. N. Radishev (had been working) for Commerce Board.
4. G. R. Derzhavin (had been working) at the Customs tariff for two years when Paul I ( decided) to abolish it.
5. He (was sure) that protectionist policy (would stimulate) industrial production.
6. He (worked) for the Customs for 15 years. Then he ( retired).
7. While he (was collecting) customs duties for 20 years, he (was attacked) several times.
8. When he (was thinking over) the customs tariffs he (came) to the conclusion that it (would serve) the development of the country.
9. It (was) clear that he (was not able) to pay the amount of duty, that the excise officer (had stated) in the voucher.