The price of commodities （）on many factors like quality， demand， supply， etc.

单项选择题Youhavemadeyourclients（）toolongintheoffice.

A.wait
B.to wait
C.waited

单项选择题Productsaregradedaccordingtosizeand（）.

单项选择题Wewillanorderwithyourcompany（）fordigitalcameras.

A.reserve
B.book
C.place

单项选择题-Whataboutthecommission？（）

A.Of course， I’d give you our lowest quotation
B.I’m afraid you have to tell me how large your order is going to be
C.It’s a general practice everywhere else

单项选择题一Itincludesmerchandise，packagingandshipping，dutyifrequired，anytaxesandinsurance.（）

A.Could I get an estimate before placing an order
B.What does the estimate include
C.How many would you like to order