A library with five thousand books ________ to the nation as a gift．
A.is offeredB.has offeredC.are offeredD.have offered在线课程A
解析：
主语的附属说明部分不能算主语，如the student with a teacher，that boy together with two women，all but one，可排除C和D项，再由句意可知应用被动语态，故选A。