Câu hỏi: In 1849, Walter Hunt, ...................... American inventor, patented a designthat served as the basis for modem safety pins.

A. an

B. he was an

C. who

D. was an

Câu 1: The electric light bulb ........................ by Thomas Edison.

A. invented

B. was invented

C. invents

D. is invented

Câu 2: Books .............. of leather are longer lasting than books that are made of paper.

A. made

B. are made

C. making 

D. which made

Câu 3: Henry Ford, ..................... ,was an outstanding innovator.

A. he founded the Ford Motor Company

B. founded the Ford Motor Company

C. who founded Ford Motor Company

D. the Ford Motor Company founded

Câu 4: Computers are considered as .................... tools today.

A. the most modern

B. more modern

C. modern as

D. much modern than  

Câu 5: Samuel Clemens, ................ under the pen name Mark Twain, createdcharacters that reflected purely American life.

A. he wrote

B. was writing

C. wrote

D. who wrote

Câu 6: The journey, ........................ alone for most of the way, was in the name of charity.

A. I undertook

B. that I undertook

C. which I undertook

D. undertaking