_______ there are many different types of food, some animals spend their lives eating only one type.
One minute she burst into ______and the next minute burst out _______We just couldn’t catch her mood (情绪)at any moment
Professor Williams keeps telling his students that the future ______to the well-educated.
Don’t blame him any more. _______, he is only a child.
--The window is dirty. ----I know. It ______ for weeks.
The villagers went out to the mountain __________ the missing child.