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【单选题】
He________sleep，although he tried to，when he got on such a hunt for an idea until he had caught it. (2013·湖南，32)A.
wouldn’t
B.
shouldn’t
C.
couldn’t
D.
mustn’t
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【单选题】The scientist _____ that there would be a rainstorm the next week and it did happen. [ ]
A.
predicted
B.
varied
C.
observed
D.
debated
【单选题】Although Albert Einstein would someday be _________ famous scientist, he did not like __________ school.
A.
a; 不填
B.
a; the
C.
the; 不填
D.
the; the
【单选题】对厂用一类负荷的供电方式是( )
A.
一般由一个电源进行供电
B.
应由两个电源进行供电，备用电源采用手动切换方式投入
C.
应由两个电源供电，一个电源消失后另一个电源自动投入
D.
在全厂停电时需要继续供电