【单选题】【消耗次数：1】
二尖瓣狭窄可继发以下病变除了（ ）
①
三尖瓣相对关闭不全
②
主动脉瓣关闭不全
③
肺褐色硬化
④
槟榔肝及脾大
⑤
左心房附壁血栓形成
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had locked
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③
has locked
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10.Now Mike isn’t here. He _________ Mr. Green’s. Perhaps he _______ back in a few minutes.
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did
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have done
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has done
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comes
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had come
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have not
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didnt have
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dont have
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didn’t
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not did
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didn’t do
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didn’t did