Scientists across the world agree that this is an invention of great significance, invention that will greatly change human life.
A. a; the
B. a; an
C. / ; the
D. / ; an
网友回答
A. a; the
B. a; an
C. / ; the
(答案→)D. / ; an
解析：考查冠词。Of great significance,固定短语，意义重大的，介词后一般不加冠词。结合上文an invention一项发明，本句和前文为并列表语，泛指任何一项发明，故用不定冠词，词首音素为元音，故选D。