问题补充：
he newly-discovered star was named a Chinese astronomer his contributions to astronomy.
A. for; in favor of
B. after; in honor of
C. by; in memory of
D. as; in praise of
答案：
A. for; in favor of
(答案→)B. after; in honor of
C. by; in memory of
D. as; in praise of
解析：考查介词和介词短语,第一空填after,词组:be named after”以…命名，第二空填in honor of“为了对…表示敬意，为了纪念”句意是：新发现的星星是以中国宇航员命名的，为了纪念他对航天事业做出的贡献。选B。
