Why do you stand watch the milk _______over. A. boiling B. boiled C to boil . being boiled
American women were______ the right to vote until 1920 after many years of hard struggle.
We should keep ourselves_______ of the latest development of science and technology.
To those_______ in martial arts(武术), the period from 1972 to 1975 is often said_______ the Bruce Lee era.
Though_______ money, his parents managed to send him to university.
After he retired from office, Rogers_______ painting for a while, but soon lost interest.