---Please take these letters to post office Jack-With pleasure Dad.A. a; theB. the

问题补充：

---Please take these letters to post office ， Jack ---With pleasure, Dad.

A. a; the

B. the; a

C. a;/

D. the;/

答案：

A. a; the

B. the; a

C. a;/

(答案→)D. the;/

解析：考查冠词。句意：杰克，请把这些信带到邮局去。我非常愿意。特指双方都知道的邮局，用 the修饰With pleasure，固定短语。所以选D。