(单选题)

Mary as well as her teachers and classmates ______ with vaccine against the coronavirus already.

A.have been injected

B.has been injected

C.were injected

D.was injected

参考答案：B

参考解析：

考查就远一致及现在完成时的被动语态。句意：玛丽和她的老师同学一样，已经注射了疫苗来抵御病毒。其一，as well as遵循“就远原则”，谓语动词此时用单数，排除A、C两个选项；其二，因为句尾有already，且注射疫苗这件事情对现在产生了影响，要用现在完成时。故选B。

知识点：