72. If quality and price are satisfactory, there are _____ of good sales here. (A)r eports (B)proposals (C)prospects (D)priorities 。

54. We appreciate your patience and please _____ that we will do everything i n our power to _____ that this type of error does not occur in the future. (A)assure....ensure (B)be assured....be ensured (C)assure.....be ensured (D)be a ssured....ensure 。