Every student as well as teachers who to visit the museum asked to be at the school gate

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A. is; is
B. are; are
C. is; are
(答案→)D. are; is
解析：考查主谓一致。定语从句who      to visit the museum修饰先行词teachers，who指代teachers在句中做主语，所以使用复数形式。第二空与Every student保持一致，所以使用单数形式。