Question

_____he was tired _____he didn`t stop to have a rest 1.though,but 2.though,/ 3.but, though 4.//

Answer 1

选2
汉语中可说“虽然…但是…”，但按英语习惯，通常不能说although…but或though…but：
虽然很危险，但我要试试。
误：Although it is dangerous, but I will try.
正：Although it is dangerous, I will try. / It is dangerous, but I will try.

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Answer 2

Though,but
尽管他已经很累了但他仍然没有停下来休息。