--Who_the piano?--My sister,when she_time.A.plays;has B.is playing;has C.plays;is playing D,is playing;has had

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--Who___the piano?--My sister,when she___time.A.plays;has B.is playing;has C.plays;is playing D,is playing;has had
--Who___the piano?--My sister,when she___time.
A.plays;has B.is playing;has C.plays;is playing D,is playing;has had

--Who___the piano?--My sister,when she___time.A.plays;has B.is playing;has C.plays;is playing D,is playing;has had
B
谁在弹钢琴?
我的妹妹,当他有时间的时候她就会弹钢琴.
前面一空是考察现在进行时,后面一空是一般现在时,用第三人称单数.
希望可以帮到你is playing 表示说话人询问正在发生的情况,has 第三人称单数形式,一般现在时表示经常或习惯性动作.

B
谁在弹钢琴？
我的妹妹，当他有时间的时候她就会弹钢琴。
前面一空是考察现在进行时，后面一空是一般现在时，用第三人称单数。
希望可以帮到你

B ,is playing 表示说话人询问正在发生的情况，has 第三人称单数形式，一般现在时表示经常或习惯性动作。

--Who___the piano?--My sister,when she___time.A.plays;has B.is playing;has C.plays;is playing D,is playing;has had he is the only one of the boys who___the piano wellA.plays B.play C.piaying D.are playing我知道the only one of 后用单数形式,但是这题选A,B和C也是单数啊,请详解 who___the boys in the room?___怎么填? piano是什么意思 piano复数 the piano piano version piano是什么 acoustic piano 填空并翻译：He is one of the students who___the accident.(know) play piano 还是 play the piano play piano or play the piano? 是playing a piano 还是playing piano lean the piano还是lean piano everyone piano 跟free piano 哪个好? Those who___the school rules will be punished.A.obey B.read C.make D.break为什么选D? piano的同类词 piano 什么意思