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【多选题】
欧美旅行社，按经营范围不同，可分为： 、 、A.
旅游批发商
B.
旅游零售商
C.
旅游经营商
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举一反三
【单选题】A new study finds out that a kid can learn without ______ what he is doing.
A.
realize
B.
realized
C.
realizing
D.
to realize
【单选题】He called the police for help, that the problem was more than he could deal with.
A.
having been realized
B.
realizing
C.
realized
D.
had realized
【单选题】Only when class began _____ that he had left his book at home. [ ]
A.
will he realize
B.
he did realize
C.
did he realize
D.
should he realize
【简答题】武汉火神山医院于2020年1月25日正式开工,于2020年2月2日完工,2月3日()新型冠状病毒感染的肺炎患者。
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