( )Don't disturb me.l___letters all morning and have written ten.a.have been writing b. was writingc.writed.have written

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( )Don't disturb me.l___letters all morning and have written ten.a.have been writing b. was writingc.writed.have written

( )Don't disturb me.l___letters all morning and have written ten.a.have been writing b. was writingc.writed.have written
( )Don't disturb me.l___letters all morning and have written ten.
a.have been writing
b. was writing
c.write
d.have written

( )Don't disturb me.l___letters all morning and have written ten.a.have been writing b. was writingc.writed.have written
选A.have been writing
就是一直在做不间断的在做 就应该用完成进行时

A 因为它表示动作持续一段时间了并将持续下去。