H5N1 Bird Flu can result in death unless left ____ in time.H5N1 Bird Flu can result in death unless left ______ in time.A.treat B.to treat C.treating D.treated为什么?这句话的意思?left算是什么用法
问题描述：
H5N1 Bird Flu can result in death unless left ____ in time.
H5N1 Bird Flu can result in death unless left ______ in time.
A.treat B.to treat C.treating D.treated
为什么?这句话的意思?
left算是什么用法
答