9.Since the premium varies with the scope of _____ extra pre

9.Since the premium varies with the scope of _____ extra premium is for buyer’s account,should additional risks be covered?( )
A .assurance B.Insurance C .business D .enterprises
15._____ your information,we have received a crowd of enquiries from buyers in other directions.( )
A.On B.For C.By D.At
17.We cannot _____ present entertain any fresh orders for Younger Brand Men’s Shirts.( )
A.of B .at C .to D.for