Tourists to the international trade fair must show ______ a valid driver’s license or a personal ID card for security before ent

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问题 Tourists to the international trade fair must show ______ a valid driver’s license or a personal ID card for security before entering.

选项 A、neither
B、both
C、either
D、whether

答案C

解析 这句话的意思是说,为了安保,国际贸易博览会的游客人场前必须出示个人的有效驾驶证或身份证。either…or表选择关系,(A)neither和nor连用,表“两者都不”;(B)both和and连用,表“两者都”;(D)whether是否,后面一般跟从句。
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