1. Yang Jia, ______ English professor at ______ Chinese Academy of Science meets ______ challenges brought by the sudden loss of her eyesight and continues to make it in her work.
A. an; /; / B. /; /; / C. /; the; / D. an; the; the
2. — Which do you prefer, tea, coffee or juice?
— ______ is OK. I really don't mind.
A. None B. Any C. Either D. All
