问题
选择题
Amy spends half an hour _____ the piano every day, doesn't she?[ ]
A. to practice playing
B. practicing playing
C. practicing to play
D. to practice to play
答案
答案：B
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Amy spends half an hour _____ the piano every day, doesn't she?[ ]
A. to practice playing
B. practicing playing
C. practicing to play
D. to practice to play
答案：B