In his lecture, the professor referred to the belief, in contrast to all other countries, ______ the elderly are wise, ______ is particularly dominant （占优势的） in the Chinese culture．

 After a talk with his mother, the little boy has seen to _____ that the same mistake doesn’t happen again. 

The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as       of a great number of services. 

Since people are fond of humor，it is as welcome in conversation as ________ else.

——I’d like some more cheese.——Sorry, there’s ______ left.