— What’s that terrible noise ?— The neighbors for a party. A. have preparedB. are prepari

问题补充：

— What’s that terrible noise ?

— The neighbors for a party.

A. have prepared

B. are preparing

C. prepare

D. will prepare

答案：

A. have prepared

(答案→)B. are preparing

C. prepare

D. will prepare

解析：根据题意先排除D 项，因为回答方要说明书现在的情况；A项have prepare说明已经准备好，C项prepare是目前的习惯性动作，B项瑞在进行时表示动作的示完性。因此B 项为最佳答案。