Mr Brown is a(n)__________ secretary in our office, for he is able to do tasks successfully, without wasting time and energy.
Is the museum ___ we visited last year?
She needs the work ____ before tomorrow.
--Did a letter come for me? --Yes, ___ came for you this morning.
He is determined to devote himself to ___ the country.
Whenever we were ___, he is always ready to ___ us some help.