(2013·大纲卷)21.--I'm sorry I made a mistake! -- No body is perfect.
Lucy didn’t do well in this exam, ______ made her mother quite unhappy.
-- What do you think of __________ school sports meeting ? -- _______ great success.
--- They are quiet, aren’t they? --- Yes. They are accustomed __________ at meals.
Occasions are quite rare ____ I have the time to spend a day with my kids.
By the time he realizes he ____ into a trap, it’ll be too late for him to do anything about it.