问题
选择题
Your sister has ________ bad cold, and you must give her some medicine ________ this afternoon. [ ]
A. an; /
B. a; /
C. /; the
答案
答案：B
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Your sister has ________ bad cold, and you must give her some medicine ________ this afternoon. [ ]
A. an; /
B. a; /
C. /; the
答案：B