改错①The doctor said he (can't)(do)(anything)(to help)the old man②(How often)(do) you (hear) a le

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改错①The doctor said he (can't)(do)(anything)(to help)the old man②(How often)(do) you (hear) a le

1.The doctor said he couldn't do anything to help the old man.
2.How often do you recieve a letter?

the doctor said he couldn't do anything to help the old man..