___________ideas and contents of the 60th national day, the great ceremony was very successful.
93. The diligent student refused the help of others and insisted on working out the difficult maths problem _____.
92. It was good ______ you to invite me to join in the party.
91. They are going to erect(树立) a monument _____ memory of the men who offered their lives in defense of their country.
90. --- Who is that gentleman who talked to you just now? --- He is my uncle _____ marriage.
89. Was this piece of earthenware(陶器) made machine or _____ hand?