来自倪守忠的问题
PeopleintheWestcelebrateHalloweenby____parties.(have)填什么,
PeopleintheWestcelebrateHalloweenby____parties.(have)
填什么,


PeopleintheWestcelebrateHalloweenby____parties.(have)填什么,
PeopleintheWestcelebrateHalloweenby____parties.(have)
填什么,
having
因为by是介词,之后动词要用ing形式