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15 tháng 7 2018

Đáp án : D

Having + past participle có thể đứng đầu câu để chỉ hành động xảy ra trước đó, đồng thời có thể chỉ nguyên nhân. Vì không được báo trước về sự thay đổi lịch bay, Martin nhỡ chuyến bay của anh ấy

30 tháng 3 2018

Đáp án A

23 tháng 10 2019

Đáp án là A.

Ở đây “when interviewed” được hiểu là “when he was interviewed” 

9 tháng 4 2018

Kiến thức: Câu đồng nghĩa

Giải thích:

Được thông báo về tình trạng nguy kịch của cô, anh quyết định không nói cho cô biết vấn đề tài chính của mình.

A. Anh ấy nói với cô ấy về vấn đề tiền bạc của anh ấy vì anh ấy đang trong tình trạng nguy kịch.

B. Anh ấy không đề cập đến vấn đề tài chính của mình vì anh ấy nhận thức được tình trạng nguy kịch của cô.

C. Có người đã thông báo với cô rằng anh ta đang gặp vấn đề về tài chính khi cô đang trong tình trạng nguy kịch.

D. Mặc dù biết tình trạng nguy kịch của cô, anh ấy đã nói về vấn đề tài chính của mình.

Các phương án A, C, D không phù hợp về nghĩa.

Chọn B

10 tháng 10 2018

Chọn D

Tạm dịch:

Nếu ta lỡ chuyến bay, ta đã không thể ở biển ngay lúc này.

D. Chúng ta không lỡ chuyến bay và giờ thì chúng ta đang ỏ biển.

15 tháng 9 2017

Chọn D

Tạm dịch:

Nếu ta lỡ chuyến bay, ta đã không thể ở biển ngay lúc này.

D. Chúng ta không lỡ chuyến bay và giờ thì chúng ta đang ỏ biển.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42. HISTORY OF THE HELICOPTER Although first flight generally attributed to a fixed-wing aircraft, the helicopter actually represents the first style of flight envisioned by humans. The ancient Chinese developed a toy that rose upward when spun rapidly. As early as the mid-sixteenth century, the great Italian inventor Leonardo da Vinci had drawn a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42.

HISTORY OF THE HELICOPTER

Although first flight generally attributed to a fixed-wing aircraft, the helicopter actually represents the first style of flight envisioned by humans. The ancient Chinese developed a toy that rose upward when spun rapidly. As early as the mid-sixteenth century, the great Italian inventor Leonardo da Vinci had drawn a prototype for the machine that we now know as the helicopter.

Early in the twentieth century, a great deal of experimentation and revision was taking place with regard to helicopter flight. The well-known phrase “two steps forward and one step back” provided an apt descriptor for early flight development. 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.

On November 13, 1907, the French pioneer Paul Cornu made history by lifting a twin-rotor helicopter into the air for a few seconds without ground assistance. Several models followed without significance until in 1924 when another French pioneer, Etienne Oehmichen, became the first to fly a helicopter for one kilometer. It was a historic flight of 7 minutes and 40 seconds. By 1936, solutions have been found to many of the problems with helicopter flight.

With the introduction of the German Focke-Wulf Fw 61, the first practical helicopter became a reality.

Why was Paul Cornu’s flight important?

A. It was the first practical helicopter flight.

B. It lasted 7 minutes and 40 seconds.

C. It was the first time a helicopter lifted into the air without ground assistance.

D. It was the first time a helicopter lifted into the air.

1
31 tháng 7 2018

Đáp án C


Đáp án nằm ở dòng 1 + 2 đoạn 3: “On November 13, 1907, the French pioneer Paul Cornu made history by lifting a twin-rotor helicopter into the air for a few seconds without ground assistance”

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42.HISTORY OF THE HELICOPTERAlthough first flight generally attributed to a fixed-wing aircraft, the helicopter actually represents the first style of flight envisioned by humans. The ancient Chinese developed a toy that rose upward when spun rapidly. As early as the mid-sixteenth century, the great Italian inventor Leonardo da Vinci had drawn a...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 38 to 42.

HISTORY OF THE HELICOPTER

Although first flight generally attributed to a fixed-wing aircraft, the helicopter actually represents the first style of flight envisioned by humans. The ancient Chinese developed a toy that rose upward when spun rapidly. As early as the mid-sixteenth century, the great Italian inventor Leonardo da Vinci had drawn a prototype for the machine that we now know as the helicopter.

Early in the twentieth century, a great deal of experimentation and revision was taking place with regard to helicopter flight. The well-known phrase “two steps forward and one step back” provided an apt descriptor for early flight development. 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.

On November 13, 1907, the French pioneer Paul Cornu made history by lifting a twin-rotor helicopter into the air for a few seconds without ground assistance. Several models followed without significance until in 1924 when another French pioneer, Etienne Oehmichen, became the first to fly a helicopter for one kilometer. It was a historic flight of 7 minutes and 40 seconds. By 1936, solutions have been found to many of the problems with helicopter flight.

With the introduction of the German Focke-Wulf Fw 61, the first practical helicopter became a reality.

 

Why was Paul Cornu’s flight important?

A. It was the first practical helicopter flight

B. It lasted 7 minutes and 40 seconds

C. It was the first time a helicopter lifted into the air without ground assistance

D. It was the first time a helicopter lifted into the air

1
14 tháng 12 2017

Đáp án C

Đáp án nằm ở dòng 1 + 2 đoạn 3: “On November 13, 1907, the French pioneer Paul Cornu made history by lifting a twin-rotor helicopter into the air for a few seconds without ground assistance”

2 tháng 2 2017

Đáp án C.

Hai câu gốc: Máy bay cất cánh. Paul nhận ra anh y lên nhầm máy bay.

Câu C dùng đúng cấu trúc đảo ngữ với Not until...”: Not until/ till + clause/ Adv of time + Auxiliary + S + V

Ex: I didn’t know that I had lost my key till I got home.

= Not until/ till I got home did I know that I had lost my key.

10 tháng 8 2019

Đáp án C.

Hai câu gốc: Máy bay cất cánh. Paul nhận ra anh ấy lên nhầm máy bay.

Câu C dùng đúng cấu trúc đảo ngữ với “Not until...:”

          Not until/till + clause/ Adv of time + Auxiliary + S + V

Ex: I didn’t know that I had lost my key till I got home.

    = Not until/till I got home did I know that I had lost my key.