Mr. Swift has marked some lines on the page because ______.A.he thought Mr. Sun has writte

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Mr. Swift has marked some lines on the page because ______.

A.he thought Mr. Sun has written the letter well

B.there is something wrong about the grammer

C.they can be improved according to western culture

D.these are not polite ways of expression

请帮忙给出正确答案和分析,谢谢!

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