Mary was silent during the early part of the discussion but finally she ____ her opinion on the subject.
gave voice to
kept an eye on
turned a deaf ear of
set foot on
The internet was flooded with a game called the Ice Bucket Challenge(冰桶挑战), ________ raise awareness for a disease called ALS.
The visiting minister expressed his satisfaction with the talks, ______ that he had enjoyed his stay here.
____ on ten years of observation and study, the story shows that everyone dreams every night, whether they realize it or not.
There are more than 740 million Chinese _______ to second-hand smoking in public places now.
What a pleasant birthday party! It is worthy_______all my life.