As ______announced in today’ s papers, the Shanghai Export Commodities Fair is a

游客2024-10-25 21

问题 As ______announced in today’ s papers, the Shanghai Export Commodities Fair is also open on Sundays.

选项 A、being
B、is
C、to be
D、been

答案 B

解析 as可用作关系代词，引导定语从句，起承接前面主句的内容或引出后续主句的内容的作用，as在从句中作主语或宾语，指代整个主句。有时，助动词be可以省略。

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Greece,economically,isintheblack.Withverylittletoexportotherth