A、 In 1840.
B、 In 1820.
C、 In l804.
D、 In l890.

【正确答案】 A

【答案解析】解析：对话中男士说“You know，the first postage stamps were issued in Britain in 1840”，故选A。

A、 The British government.
B、 The individual post offices.
C、 Either the sender or the receiver of a letter.
D、 The local government.

【正确答案】 C

【答案解析】解析：对话中女士说“I did know that the charge for mail delivery before the appearance of postage stamps was paid by either the sender or the receiver”，故选C。