问题
选择题
This is _____ useful book. _____ book is written by Bill Gates. [ ]
A. the; The
B. a; A
C. a; The
D. an; The
答案
答案：C
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This is _____ useful book. _____ book is written by Bill Gates. [ ]
A. the; The
B. a; A
C. a; The
D. an; The
答案：C