Have you ever posted letters to your friends or parents? If so, you must have put stamps o

Have you ever posted letters to your friends or parents? If so, you must have put stamps on the letters before you sent them. But, how did people receive letters before stamps were invented, and who came up with the idea of using stamps?
In the past, stamps and envelopes were not used. When people wanted to send a letter, they would close the paper with a seal（封印）. The person who got the letter had to pay for it. Because costs at that time were very high, most people refused to accept letters. In fact, the sender would often place secret marks on the outside of the letter. The person who was sent the letter would read the secret message. Then, they would refuse to accept the letter and did not have to pay for it.
In Britain, Sir Rowland Hill introduced the “Post Office Reforms” in 1837. He decided that letters could go to any place in the country for a penny even if the letter had to go far away. The cost was to be paid by the sender of the letter. Payment was recorded by placing a small piece of coloured paper on the letter, the stamp! On May 6,1840, the first stamp called the “Penny Black” was born. Because the stamp was printed in black, the stamp became known as the “Penny Black”. This is now the world’s most famous stamp. This new system spread fast.
【小题1】The best title for this passage should be    A．The First Stamp.B．How Stamp Was First MadeC．Why the First Stamp Was MadeD．When Was Stamp First Made【小题2】Before stamps were used,     would pay for the letter.A．the senderB．the receiverC．the governmentD．no one【小题3】The first stamp was made    .A．more than 160 years agoB．more than two centuries agoC．less than 100 years agoD．about 100 years ago【小题4】Which of the following is true about the first stamp of China?A．It was made much earlier than the first stamp of the USB．The stamp had a snake on it C．The stamp couldn’t be found nowD．The stamp had a picture of a dragon on itA