—I just received a letter from one of my old school friends.—A. How come?B. You bet.C. Con

问题补充：

—I just received a letter from one of my old school friends.

—

A. How come?

B. You bet.

C. Congratulations!

D. That’s nice.

答案：

A. How come?

B. You bet.

C. Congratulations!

(答案→)D. That’s nice.

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