—Why don’t we take a little break?

—Didn’t we just have ________?

A. it　　　　　　　　　　　　　　 B. that

C. one　　　　　　　　　　　　   D. this

I need one more stamp before my collection ________.

A. has completed　　　　　　　　 B. completes

C. has been completed　　　　　　 D. is completed

—What happened to the priceless works of art?

—________.

A. They were destroyed in the earthquake

B. The earthquake was destroying them

C. They destroyed in the earthquake

D. The earthquake destroyed them

Mr. Smith, ________ of the ________ speech, started to read a novel.

A. tired; boring　　　　　　　　    B. tiring; bored

C. tired; bored　　　　　　　　　　 D. tiring; boring

When climbing the hill, John was knocked unconscious by an ________ rolling stone.

A. untouched　　　　　　　　　　   B. unexpected

C. unfamiliar　　　　　　　　　　   D. unbelievable

Prices of daily goods ________ through a computer can be lower than store prices.

A. are bought　　　　　　　　　　  B. bought

C. been bought　　　　　　　　　　 D. buying

—How do you deal with the disagreement between the company and the customers?

—The key _______ the problem is to meet the demand ________ by the customers.

A. to solving；making　　　　　　   B. to solving；made

C. to solve；making　　　　　　　　 D. to solve；made

The first textbooks ________for teaching English as a foreign language came out in the 16th century.

A. having written　　　　　　　　    B. to be written

C. being written　　　　　　　　　　 D. written

The computer center, ________ last year, is very popular among the students in this school.

A. open　　　　　　　　　　　　　　   B. opening

C. having opened　　　　　　　　　　   D. opened

Most of the artists ________ to the party were from South Africa.

A. invited　　　　　　　　　　　　　　  B. to invite

C. being invited　　　　　　　　　　    D. had been invited