问题
选择题
—I don't know ______ to play the violin.
—My cousin can teach you.[ ]
A. how
B. who
C. what
D. when
答案
答案：D
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—I don't know ______ to play the violin.
—My cousin can teach you.[ ]
A. how
B. who
C. what
D. when
答案：D