皮皮学，免费搜题
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【单选题】
1976年在美国费城一次退伍军人会议期间发生肺炎流行,次年分离出( )A.
肺炎球菌
B.
军团菌
C.
肺炎乙原体
D.
莱姆病螺旋体
E.
螺杆菌
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皮皮学刷刷变学霸
举一反三
【单选题】I the plumber as I learnt later that John had already phoned him.
A.
needn't phone
B.
needn't have phoned
C.
shouldn't phone
D.
shouldn't have phoned
【单选题】听力原文：M: Anthony, did you fix the leaky faucet? W: No, I had the plumber do it. Q: What happened to the faucet? (15)
A.
Anthony fixed it.
B.
The plumber fixed it.
C.
It was left leaking.
D.
It was removed.
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