空白处应该填which,that还是what,为什么?Even the smoke from a fire _____ poison ivy is burning can cause the skin poisoning.

问题描述:

空白处应该填which,that还是what,为什么?
Even the smoke from a fire _____ poison ivy is burning can cause the skin poisoning.

what吧。那是定语从句,定那烟。在句子充当状语。

填that.根据句子结构的,句中有两个动词,那么?后面的那个肯定是整个句子的谓语,前面那个是从句的谓语,易知是同位语从句,that在句中不做成分,所以填它.