many children have formed the habit of reading but ___notes meanwhilea.not take b.not to take c.not taking d.not taken

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many children have formed the habit of reading but ___notes meanwhilea.not take b.not to take c.not taking d.not taken
many children have formed the habit of reading but ___notes meanwhile
a.not take b.not to take c.not taking d.not taken

many children have formed the habit of reading but ___notes meanwhilea.not take b.not to take c.not taking d.not taken
c.not taking

B
but 前面有 do 的某种形式时, but 后面的动词不定式要省略 to ;其前没有 do 的某种形式时, but 后面的不定式要带 to
参考资料里给了一个but的专题,你可以看看

a