He won't stop drinking___ he's told by a doctor that it's killing him.
答案是unless,那可不可以是though或although?
unless 引导条件状语从句我可以理解。
如果换成though/although/while 等引导让步状语从句,是否也讲得通?
“尽管医生告诉他酒会要了他的命,但他也不会戒酒。”
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