问题
选择题
Swan. Lake is a famous ballet in four acts, ____ on a German fairytale. [ ]
A. is based
B. basing
C. based
D. bases
答案
答案：C
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Swan. Lake is a famous ballet in four acts, ____ on a German fairytale. [ ]
A. is based
B. basing
C. based
D. bases
答案：C