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 .enterprises15._____ your information,we have received a crowd of enquiries from buyers in other directions.( )A.On B.For C.By D.At17.We cannot _____ present entertain any fresh orders for Younger Brand Men’s Shirts.( )A.of B .at C .to D.for