He devoted his whole life ________ animals in danger.
—How about the party ______ at Mary’s house? —Wonderful ! Everyone had a good time.
This is the best way ______ I have thought of ______ the problem.
Great attention must be paid ______ welfare, especially in the poor area.
At this time tomorrow ______ over the Atlantic.
Chen Xiexia is the first Chinese athlete ______ the gold medal in the Beijing Olympic Games.