Any mistake made in the printing of a stamp raises its value to stamp collectors.A 21

on one inexpensive postage stamp has made the stamp 22 a million and a half times its original value.

The mistake was made more than a hundred years ago in the British colony of Mauritius, a small 23 in the Indian Ocean.24 1847 an order for stamps was sent to a London printer Mauritius was 25 the fourth country in the world to issue stamps.

Before the order was filled and delivered, a ball was planned at Mauritius'Government House, and stamps were needed to 26 the invitations.A local printer was instructed to 27 the design for the stamps.He accidentally inscribed the words “Post Office” 28 “Post Paid” on the several hundred stamps that he printed.

Today 29 only twenty-six of these misprinted stamps left, fourteen One Penny Orange-Reds and twelve Two Penny Blues.Because of the Two Penny Blue's rareness and age, collectors have paid 30 $16800 for it.

21.A.arrow

B.mistake

C.print

D.value

22.A.test

B.cause

C.course

D.worth

23.A.island

B.people

C.continent

D.land

24.A.Since

B.For

C.In

D.On

25.A.to appeal to

B.to become

C.to worry

D.to allow

26.A.deal in

B.deal with

C.send out

D.send for

27.A.decide

B.agree

C.steal

D.copy

28.A.instead of

B.instead for

C.in spite of

D.in need of

29.A.take out

B.there are

C.for example

D.X

30.A.as little as

B.as much as

C.so much

D.great deal