Câu hỏi: Choose the correct answer to fill in the blank. 

A. that are

B. being

C. are

D. are being

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

A. invented

B. was invented

C. invents

D. is invented

Câu 2: 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 3: 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

Câu 4: I .................... your keys on the table by the bed last night.

A. saw

B. are seen

C. was seen

D. see

Câu 5: 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 6: Ansel Adams was a landscape photographer ............................. photographs show the nature of the western United States.

A. of his

B. whose 

C. of whom

D. his