Her question was so difficult that I could hardly make any ____ of it at all.　 

There is nearly five thousand dollars         of goods in the shop.

Books are a worthy invention of human history since they make it possible for us to make a__of human’s thoughts.

After living in Quanzhou for five years，she has developed quite an＿＿for the city．

There is no doubt that all this puts a large _________ on a teacher with a large number of classes.