who )______that piano?My sister. when she _______ time.a. plays; has b. is playing ; has c. plays; is having d. is playing ; has had.这个题为什么会选择B呢?选择A不对吗?能不能说一下呢?谢谢啦嘿嘿...

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who )______that piano?My sister. when she _______ time.a. plays; has b. is playing ; has c. plays; is having d. is playing ; has had.这个题为什么会选择B呢?选择A不对吗?能不能说一下呢?谢谢啦嘿嘿...
who )______that piano?
My sister. when she _______ time.
a. plays; has b. is playing ; has c. plays; is having d. is playing ; has had.
这个题为什么会选择B呢?选择A不对吗?能不能说一下呢?谢谢啦嘿嘿...

who )______that piano?My sister. when she _______ time.a. plays; has b. is playing ; has c. plays; is having d. is playing ; has had.这个题为什么会选择B呢?选择A不对吗?能不能说一下呢?谢谢啦嘿嘿...
因为对话的时候,他的妹妹正在弹琴.楼主都没注意到么
谁在弹琴?
我的妹妹,当她有时间的时候(就会弹)
所以用be doing,表示现在进行时
she has懂的吧?

通常情况只有当人家弹琴是你才会问谁在弹琴,
你说对吧。所以就是B喽。