Ithasbeenannouncedthatallthestude

发布时间：2020-07-25 13:18:53

It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virusA.shallB.willC.needD.may

网友回答

A解析考查情态动词的用法：shall用于第二，第三人称表示允诺，警告，规定，句意：已经宣布所有的学生在上学前要戴口罩以免感染Sars病毒。选A。
以上问题属网友观点，不代表本站立场，仅供参考！