—Is the letter from your mother?
—Yes.But she ________the letter herself,because she doesn’t even know one word.
| A.needn’t have written | B.can’t have written |
| C.might not have written | D.should not have written |
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—Is the letter from your mother?
—Yes.But she ________the letter herself,because she doesn’t even know one word.
| A.needn’t have written | B.can’t have written |
| C.might not have written | D.should not have written |
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