单项选择题

英译汉: "Certificate of Quarantine; Sanitary Certificate; Disinfection Certificate" ( )

A．检疫证书；卫生证书；熏蒸证书
B．数量证书；卫生证书；熏蒸证书
C．检疫证书；熏蒸证书；消毒证书
D．检疫证书；卫生证书；消毒证书
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The price of oil is increasing, because it is in short ( ).
A．store
B．provision
C．reserve
D．supply
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I would gladly have paid ( ) for your dinner.
A．twice as much
B．two times as much
C．twice so much
D．as much as twice
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