Most of the housework was done by two members of the family, my sister and _______.
A fifteen- year-old girl came _____ to the bus stop only ____ the bus had gone.
Steven has a lot of work to ______ in the office since he has been away for quite a few days.
The student became ______ the danger of smoking and decided to give it up.
The police are looking for a missing boy, who is believed _______ a white pullover and a blue jeans.
----Have you seen _____ pen? I left it here this morning.----Is it ____ black one? I think I saw it somewhere.