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.---Have you any letters , sir? I'm free this time. ---No, but thank you all the

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.---Have you any letters , sir? I'm free this time. ---No, but thank you all the

.---Have you any letters ______, sir? I'm free this time.

       ---No, but thank you all the same.

       A.to type B.to be typed  C.to be typing D.typed

试题答案

B