Câu hỏi: The Great Pyramid of Giza is said to have built over a 20-year period.

A. of

B. said

C. have built

D. a

Câu 1: The governor, with his wife and children, are at home watching the election results on TV.

A. his

B. are

C. watching 

D. on TV

Câu 2: Not everyone realizes that the most largest organ of the human body is the skin.

A. not everyone

B. most largest

C. human

D. is

Câu 3: For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

A. man

B. sweet-smelling

C. using them

D. or

Câu 4: I think she will be suitable for the work because she has been working like a teacher for a long time.

A. will be

B. for

C. has been working 

D. like

Câu 5: By measuring the color of a star, astronomers can tell how hot is it.

A. measuring

B. the

C. how

D. is it

Câu 6: Sometimes it takes me about three hours finishing my round.

A. sometimes

B. me

C. hours

D. finishing