TOEFL Practice Tests 12

Trình độ TOEFL - Bài 12

1. ________ did Arthur realize that there was danger.
(A) Upon entering the store
(B) When he entered the store
(C) After he had entered the store
(D) Only after entering the store
2. In mathematics, a variable is a symbol ________ some element of a set.
(A) and representing
(B) represents
(C) that represents
(D) represents that
3. Few natural elements exist in ________ that they are rarely seen in their natural environments.
(A) such small quantities
(B) so small quantities
(C) very small quantities
(D) small quantity
4. The janitor refused to unlock the classroom door because he ________ busy.
(A) too
(B) always
(C) was
(D) himself
5. ________, which is the highest in the range, appears challenging.
(A) Climbing the mountain
(B) The mountains
(C) Up the mountain
(D) The mountain that is
6. The student managed to pass the entrance examination ________ he was blind.
(A) in spite of the fact
(B) because
(C) since
(D) unless
7. John F.Kennedy was the youngest president of the United States and ________ to be assassinated.
(A) the fourth
(B) fourth
(C) four
(D) the four
8.
________ the formulation of explanatory laws, the first step in
scientific research is the collection and description of facts.
(A) Although science's ultimate aim is
(B) Although science's ultimate aim it is
(C) Although it is science's ultimate aim
(D) Although being science's ultimate aim
9. It is earth's gravity that ________ people their weight.
(A) gives
(B) give
(C) giving
(D) given
10. _______ that new information to anyone else but the sergeant
(A) They asked him not to give
(B) They asked him to don't give
(C) They asked him no give
(D) They asked him to no give
11. Considered unique and exotic, ________.
(A) over 4,000 American households keep the llama as a pet
(B) there are over 4,000 American households that keep the llama as a pet
(C) the llama is kept as a pet in over 4,000 American households
(D) the llama kept as a pet in over 4,000 American households
12. Perhaps the oldest theories of business cycles are ________ that linked their cause to fluctuations of the harvest.
(A) whatever
(B) everything
(C) those
(D) them
13. Oscillatona, one of the few plants that can move about, ________ a wavy, gliding motion.
(A) having
(B) has
(C) being
(D) with
14. The works of Picasso were quite ________ during various periods of his artistic life.
(A) differ
(B) different
(C) different from
(D) different than
15. The more hemoglobin one has, the more oxygen is carried to ________ cells.
(A) one
(B) its
(C) their
(D) one's
16. ________ can be grown on arid land.
(A) Only a few crops
(B) Only few crop
(C) Only a little crops
(D) Only little crop
17. ________ air traffic controllers guide planes through conditions of near zero visibility.
(A) They talk with pilots and watch their approach on radar,
(B) Talking with pilots and watching their approach on radar,
(C) Talk with pilots and watch their approach on radar,
(D) When they talked with pilots and watched their approach on radar,
18. Culture influences the way ________.
(A) viewing the world
(B) that we view the world
(C) the world view
(D) is the view of the world
19. Overexposure to the sun causes ________ health problems.
(A) various
(B) among
(C) but
(D) of
20. The doctor told his receptionist that he would return ________
(A) as early as it would be possible
(B) at the earliest that in could be possible
(C) as soon as possible
(D) at the nearest early possibility