--- What is that wonderful smell?
--- Our neighbor for a party.
A. have prepared
B. is preparing
C. prepare
D. will prepare
网友回答
A. have prepared
(答案→)B. is preparing
C. prepare
D. will prepare
解析：句意：--这么好的味道是什么？--我们的邻居正在准备一个聚会。根据句意：邻居准备聚会就是在说话的时候发生的，用现在进行时，所以选B。