问题：
Susan is always the best in exams in our class because she is a _____ girl.
[ ]
A. helpful
B. polite
C. proud
D. hard-working
Susan is always the best in exams in our class because she is a _____ girl.
B. polite
C. proud
D. hard-working
[ ]
A. helpful B. polite
C. proud
D. hard-working
参考答案：