We should learn from past mistakes so as to avoid __________ into the same old trap (困境) again.
Some companies are thinking of ways to save natural _____ by making better use of the water used in the bathroom.
One should have a _______ of right and wrong.
32. Now there are many _____ in our company.
29. ___ nice, the food was sold out soon.
24. Who is it up ____ decide whether to go or not?