Every student as well as some teachers who ______to visit the Forbidden City.
______asked to be at school gate before 6:00 in the morning.A.are；areB.is；isC.is；areD.are；is
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D解析考查主谓一致。who ______to visit the Forbidden City是teachers的定语从句，定语从句的系动词和先行词保持一致，先行词teachers是复数，所以who后面用系动词are，排除B,C；as well as连接两个并列主语时，谓语动词和前一个主语保持一致，因为Every student是单数，所以第二空用is 。所以选D。