—I don't know _____ the piano. — Don't w
题型:选择题
问题:
— I don't know _____ the piano.
— Don't worry. I can teach you. [ ]
A. how to play
B. when to play
C. how playing
D. when playing
— I don't know _____ the piano.
— Don't worry. I can teach you. [ ]
A. how to play
B. when to play
C. how playing
D. when playing