The movie, ______ in a family of three generations in Shanghai in the 1940s, enjoyed a great success.
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.
-- Would you help sweep the floor? -- _____ I’d rather water the flowers.