My father didn't give up smoking until the doctor asked him to do so.(保持原句意思）My father ______ smoking ________ the doctor asked him to do so.
问题描述：
My father didn't give up smoking until the doctor asked him to do so.(保持原句意思）
My father ______ smoking ________ the doctor asked him to do so.
答
我认为狠可能kept although。应该是较简单的连词！
答
quitted/since
my father quitted smoking since the doctor ask him to do so.
答
still unless
答
has quitted
since
since前加完成时态，后加过去时态