Why did you just sit and watch? You _______ me.

A. could help  B. should help

C. could have helped     D. must have helped

Any mistake made in the printing of a stamp raises its value to stamp collectors. A mistake on one inexpensive postage stamp has made the stamp worth 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 island in the Indian Ocean. In 1847 an order for stamps was sent to a London printer — Mauritius was to become 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 send out the invitations. A local printer was instructed to copy the design for the stamps. He accidentally inscribed the words “Post Office” instead of “Post Paid” on the several hundred stamps that he printed.

Today there are 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 as much as ＄16 800 for it.

Over a century ago, Mauritius _______.

A. was an independent country

B. belonged to India

C. was one of the British colonies

D. was a small island in the Pacific Ocean

The mistake on the stamps was made _______.

A. in Mauritius      B. at Mauritius Government House

C. in a post office   D. in London

Stamp collectors have paid 16 800 for _______.

A. fourteen One Penny Orange-Reds

B. twelve Two Penny Blues

C. one One Penny Orange-Red

D. one Two Penny Blue

Of the two，I would prefer______camera，which is very easy for me to carry.

A.a small                      B.a smaller

C.the small                   D.the smaller

Not______,the process of wedding ceremony varies widely from culture to culture.

A.obviously                                B.surprisingly

C.particularly                           D.normally

—Is your headache getting ______?

—No,it’s worse.

A.better                       B.bad

C.less                                  D.well

Tom,you______leave all your clothes on the floor like this!

A.wouldn’t                          B.mustn’t

C.needn’t                            D.may not

Finding information in today’s world is easy.The_______is how you can tell if the information you get is useful or not.

A.ability                              B.competition

C.challenge                          D.knowledge

Mark was a student at this university from 1999 to 2003, _______he studied very hard and was made chairman of the Students’ Union.

A.during which time                           B.for which time

C.during whose time                           D.by that time

I saw a woman running toward me in the dark.Before I could recognize who she was,she had run back in the direction_______she had come.

A.of which                          B.by which

C.in which                           D.from which

He got well-prepared for the job interview,for he couldn’t risk______ the good opportunity.

A.to lose                             B.losing

C.to be lost                          D.being lost