He devoted all his life to ________ those who are suffering from cancer.
The boss went into the house, _____ the five boys _____ in the rain.
The reporters of all the leading newspapers _____ the trade talks between China and the United States.
I know it’s time I got down _____ my homework, but I just can’t resist _____ computer games.
—You said we would have a picnic next Friday? —_____.But it will depend on the weather.
Either you or the headmaster _____ the prize to these gifted students at the meeting.