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she spends two hours ___ the piano every day.该选什么?为什么?

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she spends two hours ___ the piano every day.该选什么?为什么?
A.practising
B.practiced
C.to practise
D.to practiced
she spends two hours ___ the piano every day.该选什么?为什么?
选:A
分析:
见牛津高阶英汉双解词典,第二个意项
spend sth (on sth/ in doing sth):use (time,etc) for a purpose,花(时间等)在某事上/做某事
这里还可以说,She spends two hours on piano every day.
或者,She spends two hours in practising the piano every day.
in可以去掉;至于为什么 practising,是把动词 practise 变成了名词性质的动名词practising .