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19. The launch of the first liquid - fueled rocket in 196.......... by flight historians........ significant as the Wright Brothers ' flight .
A. has considered to have been B. was considered / being C. is considered to be D. is considered / to have been
20 . ...............Steve to help , I'm sure he would agree . He is so kind a person . A. Even if you asked B. If you ask C. Were you to ask D. Should you ask
21. Jenny has an ....................command of Japanese cuisine .
A. intensive B. utter C. impressive D. extreme
22. The new airport has .............a lot of changes on this island .
A. brought about B. taken to C. counted in D. turned up
23. The new secretary is really asking for trouble , ........the boss's requests like that .
A. to ignore B. ignore C. is ignoring D. ignoring
24. The way in which we work has ..............a complete transformation in the past decade .
A. spent B. undertaken C. undercovered D. underdone
25. He was accused to theft , but then ..............he as the real thief confessed to the police appeared in broad daylight
A. appeared in broad daylight B. cleared his name C. kept it up his sleeve D. caught himself red - handed
26. The government has made a big effort to tackle the two most......... important our country .
A. society B. socialize C. sociable D. social
27. They have signed an agreement to protect the forests .......of all over the world
A. being cut down B. that cut down C. which are cut down D. are
28. Pat , put all your toys away ......IN CASE.........someone slips and falls on them .
A. otherwise
B increase
C provided that
D. so long as
19. The launch of the first liquid - fueled rocket in 196.......... by flight historians........ significant as the Wright Brothers ' flight .
A. has considered to have been B. was considered / being C. is considered to be D. is considered / to have been
20 . ...............Steve to help , I'm sure he would agree . He is so kind a person . A. Even if you asked B. If you ask C. Were you to ask D. Should you ask
21. Jenny has an ....................command of Japanese cuisine .
A. intensive B. utter C. impressive D. extreme
22. The new airport has .............a lot of changes on this island .
A. brought about B. taken to C. counted in D. turned up
23. The new secretary is really asking for trouble , ........the boss's requests like that .
A. to ignore B. ignore C. is ignoring D. ignoring
24. The way in which we work has ..............a complete transformation in the past decade .
A. spent B. undertaken C. undercovered D. underdone
25. He was accused to theft , but then ..............he as the real thief confessed to the police appeared in broad daylight
A. appeared in broad daylight B. cleared his name C. kept it up his sleeve D. caught himself red - handed
26. The government has made a big effort to tackle the two most......... important our country .
A. society B. socialize C. sociable D. social
27. They have signed an agreement to protect the forests .......of all over the world
A. being cut down B. that cut down C. which are cut down D. are
28. Pat , put all your toys away ...............someone slips and falls on them .
A. otherwise
B in case
C provided that
D. so long as
Đáp án A
Tại sao “tính không đối xứng” lại quan trọng với những chiếc máy bay trực thăng trước đây
Đáp án nằm ở dòng 3, 4 và 5 đoạn 2: “Uneven lift, known as dissymmetry, caused the early helicopters to flip over and confounded the inventors until the creation of the swash-plate; this allowed the rotor blade angles to be changed so that lift would be equal on each side of the shaft.”
Đáp án A
Tại sao “tính không đối xứng” lại quan trọng với những chiếc máy bay trực thăng trước đây
Đáp án nằm ở dòng 3, 4 và 5 đoạn 2: “Uneven lift, known as dissymmetry, caused the early helicopters to flip over and confounded the inventors until the creation of the swash-plate; this allowed the rotor blade angles to be changed so that lift would be equal on each side of the shaft.”
Đáp án A
Tại sao “tính không đối xứng” lại quan trọng với những chiếc máy bay trực thăng trước đây
Đáp án nằm ở dòng 3, 4 và 5 đoạn 2: “Uneven lift, known as dissymmetry, caused the early helicopters to flip over and confounded the inventors until the creation of the swash-plate; this allowed the rotor blade angles to be changed so that lift would be equal on each side of the shaft.”
Kiến thức: Câu bị động
Giải thích:
Công thức câu bị động thì hiện tại đơn diễn tả sự thật đúng: S + am/ is/ are + Ved/ V3
be considered sth to be ….: được coi cái gì là …
Tạm dịch: Việc phóng tên lửa nhiên liệu lỏng đầu tiên vào năm 1926 được các nhà sử học về máy bay coi là quan trọng như chuyến bay của anh em nhà Wright.
Chọn C